InChI=1/C15H18N4O/c1-12-6-5-10-17-15(12)19(11-9-14(16)18-20)13-7-3-2-4-8-13/h2-8,10,20H,9,11H2,1H3,(H2,16,18)/f/h16H2/b18-14- 8E8164F534479082