bromoacetic acid tert-butyl ester
(3R)-3-<(1S,5R)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-4,4-dimethylthietan-2-one
(3S)-3-<(1S,5R)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-4,4-dimethylthietan-2-one
(S)-2-((1S)-3-benzyl-7-oxo-(1rH,5cH)-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-mercapto-3-methyl-butyric acid; mercury(II) salt (1:1)