Skip to main

Chemical Entities of Biological Interest Ontology (CHEBI)

Search from vocabulary

mapear
anotar
descargar

Concept information

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > s-block molecular entity > hydrogen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic acid > carboxylic acid > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic amino compound > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > organic amino compound > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > organic amino compound > amino acid > alpha-amino acid > L-alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > s-block molecular entity > hydrogen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic acid > carboxylic acid > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic amino compound > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > organic amino compound > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > organic amino compound > amino acid > alpha-amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic oxo compound > carbonyl compound > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > s-block molecular entity > hydrogen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > hydroxides > oxoacid > carbon oxoacid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic acid > carboxylic acid > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic amino compound > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > organic amino compound > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > organic amino compound > amino acid > non-proteinogenic amino acid > non-proteinogenic alpha-amino acid > non-proteinogenic L-alpha-amino acid > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organochalcogen compound > organooxygen compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > heterocyclic compound > organic heterocyclic compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic cyclic compound > organic heterocyclic compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic cyclic compound > organic heterocyclic compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > organic cyclic compound > organic heterocyclic compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organic heterocyclic compound > oxacycle > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > aromatic compound > organic aromatic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic cyclic compound > organic aromatic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic cyclic compound > organic aromatic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > organic cyclic compound > organic aromatic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > heterocyclic compound > organic heterocyclic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic cyclic compound > organic heterocyclic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic cyclic compound > organic heterocyclic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > organic cyclic compound > organic heterocyclic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organic heterocyclic compound > heteroarene > monocyclic heteroarene > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > heterocyclic compound > organic heterocyclic compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic molecule > organic cyclic compound > organic heterocyclic compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic cyclic compound > organic heterocyclic compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > polyatomic entity > molecule > cyclic compound > organic cyclic compound > organic heterocyclic compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organic heterocyclic compound > organonitrogen heterocyclic compound > azole > oxazole > isoxazoles > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > amino acid derivative > alanine derivative > L-alanine derivative > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > amino acid derivative > alanine derivative > L-alanine derivative > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > amino acid derivative > proteinogenic amino acid derivative > L-alanine derivative > 3-(5-oxoisoxazolin-2-yl)-L-alanine
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organonitrogen compound > amino acid derivative > proteinogenic amino acid derivative > L-alanine derivative > 3-(5-oxoisoxazolin-2-yl)-L-alanine

Término preferido

3-(5-oxoisoxazolin-2-yl)-L-alanine  

Concepto genérico

Etiquetas alternativas

  • 3-(5-oxo-1,2-oxazol-2(5H)-yl)-L-alanine

Pertenece al grupo

URI

http://data.loterre.fr/ark:/67375/KFP-F3VLRPRJ-9

Descargue este concepto:

RDF/XML TURTLE JSON-LD