1-allyl-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)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[(3S)-2-oxopyrrolidin-3-yl]oxyiminoacetyl]amino]-8-oxo-3-[(1-prop-2-enylpyridin-1-ium-4-yl)sulfanylmethyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate