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