(6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[(3,4-dihydroxyphenyl)sulfonylmethoxyimino]acetyl]amino]-3-[(2-carbamoyl-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)sulfanylmethyl]-4-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid