1-Carbamoylmethyl-4-thiopyridone 、 (6R,7R)-3-(acetyloxymethyl)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[(3S)-2-oxopyrrolidin-3-yl]oxyiminoacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 生成 (6R,7R)-3-[[1-(2-amino-2-oxoethyl)pyridin-1-ium-4-yl]sulfanylmethyl]-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[(3S)-2-oxopyrrolidin-3-yl]oxyiminoacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate