tert-butyl (2R)-2-(4-amino-1-(3'-ethyl-6-fluoro-[1,1'-biphenyl]-2-yl)-1-hydroxybutyl)morpholine-4-carboxylate

tert-butyl (2R)-2-[(benzyloxy)methyl]morpholine-4-carboxylate

tert-butyl (2R)-2-[methoxy(methyl)carbamoyl]morpholine-4-carboxylate

1,1-dimethylethyl (2R)-2-[4,4-bis(methyloxy)butanoyl]-4-morpholinecarboxylate

1,1-dimethylethyl (2R)-2-[(1R)-1-(3'-ethyl-6-fluoro-2-biphenylyl)-1-hydroxy-4,4-bis(methyloxy)butyl]-4-morpholinecarboxylate