2,2,2-trichloroethyl (1S,3S,5R,6R)-6-phenylacetamido-2,2-dimethylpenam-3-carboxylate, 1-oxide

2,2,2-trichloroethyl 7α-ethylthioceph-3-em

10-acetoxy-1β-oxo-6β-(2-phenyl-acetylamino)-1λ4-penicillanic acid 2,2,2-trichloro-ethyl ester

10-chloro-6β-(2-phenyl-acetylamino)-penicillanic acid 2,2,2-trichloro-ethyl ester

2,2,2-trichloroethyl 6α-phenylselenopenicillanate (1S)-S-oxide

2-[(2R)-2r-benzothiazol-2-yldisulfanyl-4-oxo-3c-(2-phenyl-acetylamino)-azetidin-1-yl]-3-methyl-but-2-enoic acid 2,2,2-trichloro-ethyl ester

(6R)-3t-chloro-3c-methyl-8-oxo-7t-(2-phenyl-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]octane-2c-carboxylic acid 2,2,2-trichloro-ethyl ester