3-deacetyloxy-7-aminocephalosporanic acid
(6R)-7t-benzoylamino-3-methyl-2-methylsulfanyl-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2c-carboxylic acid 2,2,2-trichloro-ethyl ester
(6R)-7t-amino-3-methyl-2-methylsulfanyl-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2c-carboxylic acid 2,2,2-trichloro-ethyl ester
(6R)-3-methyl-2-methylsulfanyl-8-oxo-7t-tritylamino-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2c-carboxylic acid 2,2,2-trichloro-ethyl ester
2,2,2-trichloroethyl ester of 7-aminodeacetoxycephalosporanic acid