CAS:497-23-4 : kuv Molecular Formula:C4H4O2 Molecular Luj:84.07 ib EINECS:207-839-3 ib Synonyms:γ-Crotonolactone, 2-Buten-1,4-olide; 2,5-Dihydrofuranone; 5-Oxo-2,5-dihydrofuran-3-yl ester; a,b-Crotonolactone; Crotonic acid, 4-hydroxy-; 2,5-Dihydrofuran-2-ib qho; 2(5H)-Furanone, γ-Crotonolactone, 2-Buten-1,4-olide2(5H)-Furanone 2-Oxo-2,5-dihydrofuran; 2 (5H)-FURANONE rau ; SYNTHESIS 1 ML