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

(3S,4R)-3-<(R)-1-tert-Butyldimethylsilyloxyethyl>-4-<(1R,2R)-2,3-epoxy-1-methylpropyl>-2-azetidinone

(3S,4R)-3-<(R)-1-tert-Butyldimethylsilyloxyethyl>-4-<(1R,2S)-2,3-epoxy-1-methylpropyl>-2-azetidinone

p-Methoxybenzyl (1S,5R,6S)-2-Hydroxymethyl-1-methyl-6-<(R)-1-trinthylsilyloxyethyl>carbapen-2-em-3-carboxylate