InChI=1S/C31H35NO8/c1-19(39-31-28(35)26(33)27(34)29(40-31)30(36)37)24(20-9-5-3-6-10-20)25(21-11-7-4-8-12-21)22-13-15-23(16-14-22)38-18-17-32-2/h3-16,19,26-29,31-35H,17-18H2,1-2H3,(H,36,37)/b25-24+