2,2,2-trichloroethyl (1S,6R,7R)-3-chloromethyl-7-(thien-2-ylacetamido)ceph-3-em-4-carboxylate 1-oxide
2,2,2-trichloroethyl (1S,6R,7R)-3-bromomethyl-7-(thien-2-ylacetamido)ceph-3-em-4-carboxylate 1-oxide
2,2,2-trichloroethyl(1S,6R,7R)-3-benzyl-7-formamidoceph-3-em-4-carboxylate 1-oxide
cefaloridine
2,2,2-trichloroethyl(6R,7R)-3-benzyl-7-(thien-2-ylacetamido)-ceph-3-em-4-carboxylate