InChI=1S/C21H20O13S/c22-8-17-18(25)19(26)20(27)21(33-17)31-10-2-3-11-13(24)7-14(32-15(11)6-10)9-1-4-12(23)16(5-9)34-35(28,29)30/h1-7,17-23,25-27H,8H2,(H,28,29,30)