(S)-3-benzyl-2,2-dimethyl-4-oxazolidinepropenoic acid ethyl ester

ethyl (E,R)-4-(N-benzylamino)-5-hydroxy-2-pentenoate

(S)-4-(benzylamino)-5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pentenoic acid ethyl ester

(3S,4S)-methyl 3-[2-(tert-butoxy)-2-oxoethyl]-2-methoxy-4-(prop-1-en-2-yl)pyrrolidine-1-carboxylate