4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-bromo-6-[(S)-hydroxy(1-methyl-1H- 1,2,3-triazol-4-yl)methyl]-3,3-dimethyl-7- oxo-,(4-methoxyphenyl)methyl ester,(2S,5R,6S)-