2H-1-Benzopyran-2-one, 3-(3,4-dimethylphenyl)-4-hydroxy- 3-(3,4-Dimethylphenyl)-4-hydroxy-2H-1-benzopyran-2-one 3-(3,4-Dimethylphenyl)-4-hydroxycoumarin 73791-13-6 BRN 1289625 COUMARIN, 3-(3,4-DIMETHYLPHENYL)-4-HYDROXY-