InChI=1/C15H16N4O2/c1-3-18-13-11(14(20)19(4-2)15(18)21)16-12(17-13)10-8-6-5-7-9-10/h5-9H,3-4H2,1-2H3,(H,16,17)/f/h16H 7B93310608DB6114