InChI=1S/C28H37N3O2/c1-17(2)11-12-19-9-6-10-20-22(19)29-24(33)28(20)15-26-16-31-18(3)8-7-13-27(31,23(32)30-26)14-21(26)25(28,4)5/h6,9-11,18,21H,7-8,12-16H2,1-5H3,(H,29,33)(H,30,32)/t18-,21?,26+,27-,28-/m0/s1