Sodium (1S,5R,6S)-2-(1-ethyl-1-H-tetrazol-5-yl)thiomethyl-6-<(R)-1-hydroxyethyl>-1-methylcarbapen-2-em-3-carboxylate

Sodium (1S,5R,6S)-6-<(R)-1-hydroxyethyl>-1-methyl-2-(3-sodiumcarboxy-2-pyridyl)thiomethylcarbapen-2-em-3-carboxylate

Sodium (1S,5R,6S)-6-<(R)-1-hydroxyethyl>-1-methyl-2-(4-oxo-4H-pyrido<1,2-a>pyrimidin-9-yl)thiomethylcarbapen-2-em-3-carboxylate

Sodium (1S,5R,6S)-6-<(R)-1-hydroxyethyl>-2-<1-(2-hydroxy)ethyl-1H-tetrazol-5-yl>thiomethyl-1-methylcarbapen-2-em-3-carboxylate

[(2R,3S)-2-((R)-3-Acetoxy-1-methyl-2-oxo-propyl)-4-oxo-3-((R)-1-triethylsilanyloxy-ethyl)-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid 4-methoxy-benzyl ester