p-nitrobenzyl (5R,6S)-3-(6-amino-2-benzimidazolylthio)-6-[(1R)-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate 生成
(5R,6S)-3-(6-amino-2-benzimidazolylthio)-6-[(1R)-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid