2-amino-4-benzyloxy-3-hydroxy-butyric acid methyl ester
benzyloxyacetoaldehyde
(2-methyl-[1,3]dioxolan-2-yl)-acetic acid
5c-benzyloxymethyl-3-[(2-methyl-[1,3]dioxolan-2-yl)-acetyl]-oxazolidine-4r-carboxylic acid methyl ester
formaldehyd
5t-benzyloxymethyl-3-[(2-methyl-[1,3]dioxolan-2-yl)-acetyl]-oxazolidine-4r-carboxylic acid methyl ester
3-[(2-methyl-[1,3]dioxolan-2-yl)-acetyl]-5t-(phenylselanyl-methyl)-oxazolidine-4r-carboxylic acid methyl ester
3-(3-oxo-butyryl)-5t-(phenylselanyl-methyl)-oxazolidine-4r-carboxylic acid methyl ester
7-oxo-3t-(phenylselanyl-methyl)-(5rH)-4-oxa-1-aza-bicyclo[3.2.0]heptane-2c-carboxylic acid methyl ester