InChI=1S/C26H29NO6S/c1-4-24(19-9-6-5-7-10-19)26(21-11-8-12-23(17-21)33-34(29,30)31)20-13-15-22(16-14-20)32-18-25(28)27(2)3/h5-17,25,28H,4,18H2,1-3H3,(H,29,30,31)/b26-24+