InChI=1S/C26H29NO6S/c1-19(33-34(29,30)31)25(20-8-5-4-6-9-20)26(22-10-7-11-23(28)18-22)21-12-14-24(15-13-21)32-17-16-27(2)3/h4-15,18-19,28H,16-17H2,1-3H3,(H,29,30,31)/b26-25+