(S)-3-(2'-methylpropylidene)amino-4-phenylmethyl-2-oxazolidinone

(4S,3'R)-3-(2'-methyl-3'-pentanamino)-4-phenylmethyl-2-oxazolidinone

(4S,1'R)-3-(1'-ethyl-3'-butenylamino)-4-phenylmethyl-2-oxazolidinone

(S)-3-amino-4-benzyl-1,3-oxazolan-2-one

(S)-3-(cyclohexylmethylidene)amino-4-phenylmethyl-2-oxazolidinone