InChI=1/C18H20N4O/c1-23-14-8-4-5-12(9-14)15-10-22(13-6-2-3-7-13)18-16(15)17(19)20-11-21-18/h4-5,8-11,13H,2-3,6-7H2,1H3,(H2,19,20,21)/f/h19H2 DBBC1E5DEC4B4CC8