(6R-(6alpha,7))-((Amino-1,4-cyclohexadien-1-ylacetyl)amino)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
(6R,7R)-7-[[(2E)-2-(2-Amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-[(2-methyl-5,6-dioxo-1H-1,2,4-triazin-3-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
1-[[(6R,7R)-7-[[(2Z)-(2-Amino-4-thiazolyl)[(1-carboxy-1-methylethoxy)imino] acetyl] amino]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0] oct-2-en-3-yl]methyl]pyridinum hydroxide inner salt
