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