22975-76-4 2H-Furo(2,3-h)(1)benzopyran-2-one, 4,9-dimethyl-, plus ultraviolet A radiation 2H-Furo(2,3-h)-1-benzopyran-2-one, 4,9-dimethyl- (8CI,9CI) 4,4'-DIMETHYLANGELICIN 4,4'-Dimethylangelicin plus ultraviolet a radiation 4,4'-Dimethylisopsoralen 4,4'-Dimethylisopsoralen plus ultraviolet a radiation 4,9-Dimethyl-2H-furo(2,3-h)-1-benzopyran-2-one plus ultraviolet a radiation 5-19-04-00467 (Beilstein Handbook Reference) BRN 0196616