InChI=1S/C25H40N2O9/c28-20(13-11-9-7-5-3-1-2-4-6-8-10-12-14-23(31)32)26-19(25(34)35)15-18-24(33)36-27-21(29)16-17-22(27)30/h19H,1-18H2,(H,26,28)(H,31,32)(H,34,35)/t19-/m0/s1