InChI=1S/C21H22O12S/c1-9-18(24)19(25)20(26)21(30-9)32-16-7-11(22)6-15-17(16)13(23)8-14(31-15)10-2-4-12(5-3-10)33-34(27,28)29/h2-7,9,14,18-22,24-26H,8H2,1H3,(H,27,28,29)