tris(p-nitrophenyl)-phosphite
(S)-2-(Benzyloxycarbonyl-methyl-amino)-3-(4-benzyloxycarbonyloxy-phenyl)-propionic acid
N,O-dimethyl-N-(toluene-4-sulfonyl)-L-tyrosine
(S)-2-[N-(4-methylphenyl)sulfonylamino]-3-(4-hydroxyphenyl) propionic acid
N-methyl-L-tyrosine