Butyrolactone

/ˌbjuːtəroʊˈlæktəʊn/ noun

A colorless, solvent chemical compound with a five-membered ring structure, used in pharmaceuticals and industry (often abbreviated as GBL).

From butyro- (butyric) + lactone (a cyclic ester). The name describes the molecular structure: butyric acid component in a ring (lactone) form.

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