InChI=1S/C28H38N2O3/c1-3-5-7-8-9-10-11-12-14-28(32)33-26-21-19-25(20-22-26)30-29-24-17-15-23(16-18-24)27(31)13-6-4-2/h15-22H,3-14H2,1-2H3/b30-29+