2-((2S,3S)-3-(2-amino-3-hydroxypropanamido)tetrahydro-2H-pyran-2-yl)-5-guanidino-2,4-dihydroxypentanoic acid

N-(3,5-dinitro-benzoyl)-L-serine

(S)-3-amino-2-benzoylamino-propionic acid methyl ester, hydrochloride

NH2-Ser(Bn)-OMe

(2S)-2-benzamido-3-hydroxypropanoic acid