异氰酸对硝基苯

4-morpholino-N-phenylpyridin-2-amine

2-溴-４-硝基吡啶氮氧化物

N-(4-chloro-1-oxidopyridin-1-ium-2-yl)-N-phenylacetamide

1-hydroxy-4-nitro-N-phenylpyridin-2-imine