InChI=1S/C27H35N3O7/c1-36-24-15-19(5-9-22(24)32)7-11-26(34)29-14-4-3-13-28-17-21(31)18-30-27(35)12-8-20-6-10-23(33)25(16-20)37-2/h5-12,15-16,21,28,31-33H,3-4,13-14,17-18H2,1-2H3,(H,29,34)(H,30,35)/b11-7?,12-8+