1H-2-benzopyran-1-one, 6,8-dihydroxy-3-(2-hydroxypropyl)- 6,8-dihydroxy-3-(2-hydroxypropyl)-1H-isochromen-1-one InChI=1/C12H12O5/c1-6(13)2-9-4-7-3-8(14)5-10(15)11(7)12(16)17-9/h3-6,13-15H,2H2,1H