InChI=1S/C21H30N2O2/c1-4-15-14-23(2)12-10-16(15)5-8-21(24)18-9-11-22-20-7-6-17(25-3)13-19(18)20/h6-7,9,11,13,15-16,21,24H,4-5,8,10,12,14H2,1-3H3/t15-,16+,21+/m0/s1