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