for the following products
4-Amino-N-((2R,3S)-3-amino-2-hydroxy-4-phenylbutyl)-N-isobutylbenzenesulfonamide | 4-Amino-N-[(2R,3S)-3-amino-2-hydroxy-4-phenylbutyl]-N-(2-methylprop yl)-benzenesulfonamide | Benzenesulfonamide,4-amino-N-[(2R,3S)-3-amino-2-hydroxy-4-phenylbutyl]-N-(2-methylpropyl)- | Darunavir Impurity A and (2R,3S)-N-(3-amino-2-hydroxy-4-phenylbutyl)-n-isobutyl-4-amino-benzenesulfonamde
