4-溴苯酚

4-硝基苯基 N-(苄氧羰基)-L-色氨酸酯

4-nitrophenyl 2,2,2-trifluoro-1,1-diphenylethanesulfonate

4-nitrophenyl 2,4-dinitrobenzoate

p-nitrophenyl 2-methoxyacetate