英文别名
                        (6R,7R)-7-((R)-1-Hydroxy-ethyl)-8-oxo-3-(toluene-4-sulfonyloxy)-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid tert-butyl ester;(6R,7S)-7-((R)-1-Hydroxy-ethyl)-8-oxo-3-(toluene-4-sulfonyloxy)-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid tert-butyl ester