Synonyms: Crotonicacid, 4-hydroxy-, g-lactone (6CI,7CI);2,5-Dihydrofuranone;2-Buten-4-olide;2-Butenoic acid,4-hydroxy-, g-lactone;2-Oxo-2,5-dihydrofuran;4-Hydroxy-2-butenoic acid lactone;4-Hydroxy-2-butenoicacid g-lactone;5-Oxo-2,5-dihydrofuran-3-yl ester;5H-Furan-2-one;Butenolide;Isocrotonolactone;NSC 197009;NSC 51296;Da,b-Butenolide;a,b-Crotonolactone;g-Crotolactone;g-Crotonolactone;g-Hydroxycrotonic acid lactone;