3-Furancarboxylic acid, tetrahydro-2-oxo-, ethyl ester (9CI) 3-Furoic acid, tetrahydro-2-oxo-, ethyl ester 5-18-08-00005 (Beilstein Handbook Reference) 936-13-0 BRN 0130517 Carbethoxybutyrolactone Ethyl tetrahydro-2-oxo-3-furancarboxylate Tetrahydro-2-oxo-3-furoic acid ethyl ester