for the following products
(4S,5R)-3,5-Oxazolidine dicarboxylic acid-2,2-dimethyl-4-phenyl-3-(1,1-dimethylethyl)ester | 3,5-Oxazolidine dicarboxylic acid 2,2-dimethyl-4-phenyl-3-(1,1-dimethylethyl)ester, (4S,5R) and (4S,5R)-3-(tert-Butoxycarbonyl)-2,2-dimethyl-4-phenyloxazolidine-5-carboxylic acid
