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.
Gamma-butyrolactone (GBL) is a remarkable chemical—it's a legitimate industrial solvent but also a drug precursor, so it's tightly regulated, showing how the same molecule can be chemical tool or dangerous substance depending on intent.
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