InChI=1S/C28H48N4O9/c1-3-5-7-9-11-15-25(35)31(40)19-13-17-29-23(33)21-28(39,27(37)38)22-24(34)30-18-14-20-32(41)26(36)16-12-10-8-6-4-2/h11-12,15-16,39-41H,3-10,13-14,17-22H2,1-2H3,(H,29,33)(H,30,34)(H,37,38)/b15-11+,16-12+