InChI=1/C13H14N6O/c14-7-4-5-10-9(6-7)16-13(11-12(15)18-20-17-11)19(10)8-2-1-3-8/h4-6,8H,1-3,14H2,(H2,15,18)/f/h15H2 3905BB1A4D35C51D