15798-77-3 2H-Furo(2,3-h)(1)benzopyran-2-one, 8-methyl- 2H-Furo(2,3-h)-1-benzopyran-2-one, 8-methyl- 5'-Methylangelicin 8-Methyl-2H-furo(2,3-h)-1-benzopyran-2-one