2,2,2-trichloroethyl (1S,6R,7R)-N-[7-(thien-2-ylacetamido)ceph-3-em-3-ylmethyl]pyridinium chloride 4-carboxylate 1-oxide

2,2,2-trichloroethyl (1S,6R,7R)-7-amino-3-chloromethylceph-3-em-4-carboxylate 1-oxide

2,2,2-trichloroethyl (6R,7R)-N-(7-(thien-2-ylacetamido)ceph-3-em-3-ylmethyl)pyridinium chloride 4-carboxylate