(6R,7R)-3-(Chloromethyl)-7-[[(tert-butoxy)carbonyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicaciddiphenylmethylester;Diphenylmethyl7beta-Tert-Butoxycarbonylamino-3-Chloromethyl-3-Cephem-4-Carboxylate;(6R,7R)-3-(chloromethyl)-7-[[(1,1-dimethylethoxy)carbonyl]amino]-8-oxo-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicaciddiphenylmethylester;benzhydryl(6R,7R)-3-(chloromethyl)-7-[(2-methylpropan-2-yl)oxycarbonylamino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;BOC-ACLH;(6R,7R)-Benzhydryl7-((tert-butoxycarbonyl)amino)-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4;(6R,7R)-Benzhydryl7-((tert-butoxycarbonyl)aMino)-3-(chloroMethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;(6R,7R)-Benzhydryl7-((tert-butoxycarbonyl)amino)-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4.2.