Premodifier: carboxylic
Head noun: anhydride

Same concepts
http://dbpedia.org/resource/Organic_acid_anhydride

Broader concepts

labelprovenanceconfidence
acylating agentisap:130267000.633311

Narrower concepts

labelprovenanceconfidence
acetic anhydrideisap:3522880770.679930
phthalic anhydrideisap:3522880550.577615