InChI=1S/C21H31N3/c22-15-9-3-1-2-4-10-16-23-21-17-11-5-7-13-19(17)24-20-14-8-6-12-18(20)21/h5,7,11,13H,1-4,6,8-10,12,14-16,22H2,(H,23,24)/p+2