... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > acid anhydride > acyclic acid anhydride > acyclic carboxylic anhydride > formic anhydride

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > oxygen molecular entity > organooxygen compound > carbonyl compound > carboxylic anhydride > acyclic carboxylic anhydride > formic anhydride

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > organochalcogen compound > organooxygen compound > carbonyl compound > carboxylic anhydride > acyclic carboxylic anhydride > formic anhydride

... > 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 anhydride > acyclic carboxylic anhydride > formic anhydride

... > 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 anhydride > acyclic carboxylic anhydride > formic anhydride

... > chemical entity > molecular entity > polyatomic entity > molecule > organic molecule > organic oxo compound > carbonyl compound > carboxylic anhydride > acyclic carboxylic anhydride > formic anhydride

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > acid anhydride > carboxylic anhydride > acyclic carboxylic anhydride > formic anhydride