InChI=1S/C18H18O11S/c1-26-17-13(21)11-12(20)10(7-28-16(11)14(22)18(17)27-2)15(29-30(23,24)25)8-3-5-9(19)6-4-8/h3-6,10,15,19,21-22H,7H2,1-2H3,(H,23,24,25)