InChI=1S/C21H20O10S/c1-10(2)4-5-12-14(9-29-32(26,27)28)19-17(7-16(12)24)30-20-13(8-22)15(23)6-11(3)18(20)21(25)31-19/h4,6-8,23-24H,5,9H2,1-3H3,(H,26,27,28)