4-nitro-N-phenylcarbamoyl-phenylalanine
4-(4-nitro-benzyl)-oxazolidine-2,5-dione
{4-[bis-(2-hydroxy-ethyl)-amino]-benzyl}-formylamino-malonic acid diethyl ester
dichloroacetic acid-[(R or S)-1-hydroxymethyl-2-(4-nitro-phenyl)-ethylamide]
2-amino-3-(4-nitrophenyl)propan-1-ol