InChI=1S/C19H26O7S/c1-13(2)6-5-7-15(12-26-27(22,23)24)8-9-16-10-17(21)11-18(25-4)19(16)14(3)20/h6,8,10-11,21H,5,7,9,12H2,1-4H3,(H,22,23,24)/b15-8-