105420-78-8
(5R,6S)-6-<(1R)-hydroxyethyl>-2-<(2R)-pyrrolidin-2-yl>methyl-2-penem-3-carboxylic acid
105420-68-6
p-nitrobenzyl (5R,6S)-6-<(1R)-hydroxyethyl>-2-<(2S)-N-p-nitrobenzyloxycarbonylpyrrolidin-2-yl>-2-penem-3-carboxylate
105420-64-2
p-nitrobenzyl (5R,6S)-6-<(1R)-hydroxyethyl>-2-<(2S)-N-p-nitrobenzyloxycarbonylpyrrolidin-2-yl-methyl>-2-penem-3-carboxylate
105420-58-4
p-nitrobenzyl (5R,6S)-6-<(1R)-(tert-butyldimethylsiloxy)ethyl>-2-<(2S)-N-p-nitrobenzyloxycarbonylpyrrolidin-2-yl>-2-penem-3-carboxylate
105420-54-0
p-nitrobenzyl (5R,6S)-6-<(1R)-(tert-butyldimethylsiloxy)ethyl>-2-<(2S)-N-p-nitrobenzyloxycarbonylpyrrolidin-2-yl-methyl>-2-penem-3-carboxylate