for the following products
(2R,3S)-3-Benzoylamino-2-hydroxy-3-phenylpropionic aicd methyl ester | (2R,3S)-N-Benzoyl-3-phenylisoserine methyl ester | Bz-RS-iSer(3-Ph)-OMe | Methyl(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropionate | Paclitaxel side chian and Methyl (2R,3S)-3-(benzoylamino)-2-hydroxy-3-phenylpropanoate
