InChI=1S/C18H18O9S/c1-24-13-8-12(19)14-15(20)11(9-26-18(14)17(13)25-2)16(27-28(21,22)23)10-6-4-3-5-7-10/h3-8,11,16,19H,9H2,1-2H3,(H,21,22,23)