InChI=1S/C21H20O11S/c1-21(25,9-30-33(26,27)28)18-7-14-16(31-18)8-17-13(19(14)29-2)6-12(20(24)32-17)11-4-3-10(22)5-15(11)23/h3-6,8,18,22-23,25H,7,9H2,1-2H3,(H,26,27,28)