1-(Cyclohexyloxycarbonyloxy)ethyl(1S,5R,6S)-2-[7-(N,N-dimethylsulfamoyl)imidazo[5,1-b]thiazol-2-yl]-6-((1R)-1-hydroxyethyl)-1-methyl-1-carbapen-2-em-3-carboxylate

1-(Cyclohexyloxycarbonyloxy)ethyl(1S,5R,6S)-2-(7-N-acetylaminomethylimidazo[5,1-b]thiazol-2-yl)-6-((1R)-1-hydroxyethyl)-1-methyl-1-carbapen-2-em-3-carboxylate

1-(Cyclohexyloxycarbonyloxy)ethyl(1S,5R,6S)-2-(7-hydroxyacetylimidazo[5,1-b]thiazol-2-yl)-6-((1R)-1-hydroxyethyl)-1-methyl-1-carbapen-2-em-3-carboxylate

(S)-3-aminomethyl-5-methyl-hexanoic acid 1-cyclohexyloxycarbonyloxy-ethyl ester trifluoroacetate