(6R,7R)-7-[[(2Z)-2-[5-[[(2R)-2-[[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-hydroxyiminoacetyl]amino]-2-[(2R)-4-carboxy-5-[(E)-[1-[(3R)-1-[(5-methyl-2-oxo-1,3-dioxol-4-yl)methoxycarbonyl]pyrrolidin-3-yl]-2-oxopyrrolidin-3-ylidene]methyl]-3,6-dihydro-2H-1,3-thiazin-2-yl]acetyl]amino]-1,2,4-thiadiazol-3-yl]-2-hydroxyiminoacetyl]amino]-3-[(E)-[1-[(3R)-1-[(5-methyl-2-oxo-1,3-dioxol-4-yl)methoxycarbonyl]pyrrolidin-3-yl]-2-oxopyrrolidin-3-ylidene]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid