InChI=1S/C21H26O12S/c1-9-12-14(30-19(24)21(4)10(2)31-21)13(33-34(25,26)27)11(18(23)28-5)7-6-8-20(3)16(32-20)15(12)29-17(9)22/h7,10,12-16H,1,6,8H2,2-5H3,(H,25,26,27)/b11-7+