InChI=1S/C20H28O7S/c1-6-13(10-26-28(23,24)25)20(22)27-18-9-15(11(3)4)19-14(7-2)17(21)8-16(19)12(18)5/h6-7,11,15-16,18-19H,5,8-10H2,1-4H3,(H,23,24,25)/b13-6-,14-7+