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