2H-1-BENZOPYRAN-3-CARBOXYLIC ACID, 7-AMINO-2-OXO-, ETHYL ESTER 4-18-00-08269 (Beilstein Handbook Reference) 7-Amino-2-oxo-2H-1-benzopyran-3-carboxylic acid ethyl ester 72705-82-9 BRN 0238044 Ethyl 7-aminocoumarin-3-carboxylate