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