InChI=1S/C21H20O12S/c1-30-20-14(21-17(26)18(11(23)8-31-21)33-34(27,28)29)19-13(15(24)16(20)25)10(22)7-12(32-19)9-5-3-2-4-6-9/h2-7,11,17-18,21,23-26H,8H2,1H3,(H,27,28,29)