InChI=1S/C21H20O12S/c22-8-16-18(24)19(25)20(26)21(32-16)31-12-5-6-13-15(7-12)30-9-14(17(13)23)10-1-3-11(4-2-10)33-34(27,28)29/h1-7,9,16,18-22,24-26H,8H2,(H,27,28,29)