Sodium (1S,5R,6S)-6-<(R)-1-hydroxyethyl>-1-methyl-2-(4-pyridyl)thiomethylcarbapen-2-em-3-carboxylate

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

p-Methoxybenzyl (1S,5R,6S)-1-methyl-2-(4-pyridyl)thiomethyl-6-<(R)-1-triethylsilyloxyethyl>carbapen-2-em-3-carboxylate