(7R)-3-(acetoxymethyl)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

(R)-3-Acetoxymethyl-7-[(R)-2-(N-methyl-hydrazino)-2-phenyl-acetylamino]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid

(6R)-3-acetoxymethyl-7t-(4-amino-benzyloxycarbonylamino)-7c-methoxy-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

Benzhydryl 7β-(α-methoxybenzylideneamino)-cephalosporanate

benzhydryl 7β-aminocephalosporanate

(R)-3-Acetoxymethyl-7-[1-methoxy-eth-(E)-ylideneamino]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

(6R)-3-acetoxymethyl-7t-(4-nitro-benzyloxycarbonylamino)-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester