(R)-4-(2-benzoyl-phenylcarbamoyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

(R)-3-hydroxymethyl-5-phenyl-1,3-dihydro-benzo[e][1,4]diazepin-2-one

(R)-3-(tert-butyl-dimethyl-silanyloxymethyl)-5-phenyl-1,3-dihydro-benzo[e][1,4]diazepin-2-one

[(3R)-3-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-oxo-5-phenyl-2,3-dihydro-1H-1,4-benzodiazepin-1-yl]acetic acid

(R)-[3-(tert-butyl-dimethyl-silanyloxymethyl)-2-oxo-5-phenyl-2,3-dihydro-benzo[e][1,4]diazepin-1-yl]-acetic acid ethyl ester