InChI=1S/C21H28N2O/c1-6-21(3,4)20-14-10-16-18(19(24)12(2)11-23(16)5)13-8-7-9-15(22-20)17(13)14/h6-9,12,16,18-19,22,24H,1,10-11H2,2-5H3/t12-,16+,18+,19-/m0/s1