InChI=1/C18H17N3/c19-14-7-8-16-13(10-14)6-9-18(20-16)21-17-11-15(17)12-4-2-1-3-5-12/h1-10,15,17H,11,19H2,(H,20,21)/t15-,17+/m1/s1/f/h21H 5321A8F938E213FA