3H-2-BENZOPYRAN-3-ONE, 1,4-DIHYDRO-4-BROMO-1-METHYL-, trans- 95991-74-5 BRN 4414695 trans-1,4-Dihydro-4-bromo-1-methyl-3H-2-benzopyran-3-one trans-4-Bromo-1-methyl-3-isochromanone