InChI=1/C16H16N4O/c1-2-7-16(17)11-6-4-3-5-10(11)12-13(16)20-9-8-18-14(20)15(21)19-12/h3-6,8-9H,2,7,17H2,1H3,(H,19,21)/t16-/m1/s1/f/h19H 4A86925B1B801BCD