InChI=1/C19H21N5/c20-9-10-21-11-12-22-19-17-13-5-1-3-7-15(13)23-18(17)14-6-2-4-8-16(14)24-19/h1-8,21,23H,9-12,20H2,(H,22,24)/p+2/fC19H23N5/h20,22,24H/q+2 60E51D78517B14E1