for the following products
(1S,2R)-2-Hydroxy-3-[(2-methylpropyl)amino]-1-(phenylmethyl)propyl]carbamic acid 1,1-dimethylethyl ester | ([1S,2R]-(1-Benzyl-2-hydroxy-3-(isobutyl-amino)propyl)carbamic acid tert-butylester and tert-Butyl [(1S,2R)-1-benzyl-2-hydroxy-3-(isobutylamino)propyl]carbamate
