for the following products
(2R,3S)-boc-3-Phenylisoserine | Benzenepropanoic acid, b-[[(1,1-dimethylethoxy)carbonyl]amino]-a-hydroxy-(aR,bS)- | Boc-(2R,3S)-3-phenylisoserine | N-Boc-(2R,3R)-3-amino-2-hydroxy-3-phenylpropionic acid and (2R,3S)-3-tert-Butoxy-carbonylamino-2-hydroxy-3-phenylpropionic acid