InChI=1S/C18H26O8S/c1-13(2)7-5-4-6-8-15(19)18(20)25-12-14-9-10-16(17(11-14)24-3)26-27(21,22)23/h5,7,9-11,13,15,19H,4,6,8,12H2,1-3H3,(H,21,22,23)/b7-5+