英文名称:(6R,7R)-7-[(1-benzylpyridinium-4-yl)amino]-3-{[(1-methyl-1H-tetrazol-5-yl)sulfanyl]methyl}-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate; pyridinium, 4-[[(6R,7R)-2-carboxy-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-7-yl]amino]-1-(phenylmethyl)-, inner salt