InChI=1S/C23H29N3O2/c1-2-15-25-22(27)19-14-9-16-26(19)23(28)21(24)20(17-10-5-3-6-11-17)18-12-7-4-8-13-18/h3-8,10-13,19-21H,2,9,14-16,24H2,1H3,(H,25,27)/t19-,21+/m0/s1