1-甲基-3,5-二硝基-2-吡啶酮

methyl 1 methyl-3,5-dinitro-6-oxo-1,6-dihydro-2-pyridinecarboxylate

3,5-二(2-吡啶基)吡唑

1,3-二(2-吡啶基)-1,3-丙二酮

2-吡啶甲酰肼