InChI=1S/C20H26N2O2/c1-14-5-4-6-15(11-14)17-13-22(10-9-18(17)21)16-7-8-19(23-2)20(12-16)24-3/h4-8,11-12,17-18H,9-10,13,21H2,1-3H3/t17-,18-/m0/s1