1H-2-benzopyran-1-one, 6,8-dimethoxy-3-methyl- 6,8-dimethoxy-3-methyl-1H-isochromen-1-one InChI=1/C12H12O4/c1-7-4-8-5-9(14-2)6-10(15-3)11(8)12(13)16-7/h4-6H,1-3H