(2,2,2-trifluoroacetyl) (6R,7R)-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetyl]amino]-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 、
1,4-Diazabicyclo<4.3.0>nonan-3-one 生成 (6R,7R)-7-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-[(3-oxo-2,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-5-ium-5-yl)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate