109029-03-0 2H-Benzofuro(2,3-h)(1)benzopyran-2-one, 8,9,10,11-tetrahydro-4,6-dimethyl- 8,9,10,11-Tetrahydro-4,6-dimethyl-2H-benzofuro(2,3-h)(1)benzopyran-2-one THBA Tetrahydrobenzo-4,6-dimethylangelicin