Passer au contenu principal

Chemical Entities of Biological Interest Ontology (CHEBI)

Choisissez le vocabulaire dans lequel chercher

aligner
annoter
télécharger

Concept information

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > lipid > liposaccharide > glycolipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbohydrates and carbohydrate derivatives > carbohydrate derivative > liposaccharide > glycolipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbohydrates and carbohydrate derivatives > carbohydrate derivative > liposaccharide > glycolipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > carbohydrates and carbohydrate derivatives > carbohydrate derivative > liposaccharide > glycolipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > lipid > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > ester > phosphoric ester > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > ester > phosphoric ester > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > ester > phosphoric ester > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > organophosphorus compound > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organophosphorus compound > organic phosphate > phospholipid > glycophospholipid > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbohydrates and carbohydrate derivatives > carbohydrate derivative > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbohydrates and carbohydrate derivatives > carbohydrate derivative > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > carbohydrates and carbohydrate derivatives > carbohydrate derivative > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > ester > phosphoric ester > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > ester > phosphoric ester > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > ester > phosphoric ester > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > organophosphorus compound > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organophosphorus compound > organic phosphate > carbohydrate phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > lipid > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > ester > phosphoric ester > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > ester > phosphoric ester > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > ester > phosphoric ester > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > organophosphorus compound > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organophosphorus compound > organic phosphate > phospholipid > isoprenoid phosphate > prenol phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > isoprenoid > terpenoid > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > lipid > isoprenoid > terpenoid > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > lipid > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > ester > phosphoric ester > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > ester > phosphoric ester > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > 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 > ester > phosphoric ester > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphoric ester > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphoric acid derivative > phosphate > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > organophosphorus compound > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate
... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organophosphorus compound > organic phosphate > phospholipid > isoprenoid phosphate > terpenyl phosphate > polyprenol phosphate > polyprenyl phospho carbohydrate > polyprenyl glycosyl phosphate > 4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate

Terme préférentiel

4-amino-4-deoxy-alpha-L-arabinopyranosyl undecaprenyl phosphate  

Concept générique

Synonyme(s)

  • 4-amino-4-deoxy-1-O-(hydroxy{[(2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaen-1-yl]oxy}phosphoryl)-alpha-L-arabinopyranose

Appartient au groupe

URI

http://data.loterre.fr/ark:/67375/KFP-T38R8QC8-B

Télécharger ce concept :

RDF/XML TURTLE JSON-LD