InChI=1S/C19H26O7S/c1-12(2)6-9-17(26-27(22,23)24)13(3)7-8-15-10-16(21)11-18(25-5)19(15)14(4)20/h6-7,10-11,17,21H,8-9H2,1-5H3,(H,22,23,24)/b13-7+