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piperidinedione

n. (context chemistry English) Any derivative of piperidine with two ketone functional groups.

Wikipedia
Piperidinedione

Piperidinediones are a derivatives of piperidine with two ketone functional groups. There are six isomers, each of which has a molecular weight of 113.115 and a formula of CHNO. Piperidinediones form the core structure of a variety of pharmaceutical drugs.