InChI=1S/C31H35NO8/c1-3-24(25(20-7-5-4-6-8-20)21-11-13-22(14-12-21)38-18-17-32-2)19-9-15-23(16-10-19)39-31-28(35)26(33)27(34)29(40-31)30(36)37/h4-16,26-29,31-35H,3,17-18H2,1-2H3,(H,36,37)/b25-24+