3-(Hydroxymethyl)-2,5,9-trimethyl-7H-furo(3,2-g)(1)benzopyran-7-one 4'-(Hydroxymethyl)-4,5',8-trimethylpsoralen 62442-59-5 7H-Furo(3,2-g)(1)benzopyran-7-one, 3-(hydroxymethyl)-2,5,9-trimethyl- Hydroxymethyltrioxsalen