InChI=1/C16H18N4O2/c1-9(2)22-12-8-6-5-7-11(12)14-17-15-13(16(21)18-14)10(3)19-20(15)4/h5-9H,1-4H3,(H,17,18,21)/f/h18H 0B16FEDCB8F19E2C