1H-2-benzopyran-1-one, 6,8-dihydroxy-3-methyl- 6,8-dihydroxy-3-methyl-1H-isochromen-1-one InChI=1/C10H8O4/c1-5-2-6-3-7(11)4-8(12)9(6)10(13)14-5/h2-4,11-12H,1H