N-(tert-butoxycarbonyl)-O-(2-nitrobiphenyl-3-yl)-L-serine

tert-butyl [(3S)-4-oxo-6-phenyl-2,3,4,5-tetrahydro-1,5-benzoxazepin-3-yl]carbamate

O-(2-aminobiphenyl-3-yl)-N-(tert-butoxycarbonyl)-L-serine