2-Oxo-2H-1-benzopyran-3-carboxylic acid phenyl ester 2H-1-BENZOPYRAN-3-CARBOXYLIC ACID, 2-OXO-, PHENYL ESTER 4-18-00-05571 (Beilstein Handbook Reference) 53992-24-8 BRN 0224490 Phenyl coumarin-3-carboxylate