InChI=1S/C12H16N4O2/c17-11-10-3-1-2-4-16(10)12(18)9(15-11)5-8-6-13-7-14-8/h6-7,9-10H,1-5H2,(H,13,14)(H,15,17)/t9-,10-/m0/s1