2-({[(1Z)-2-{[(2S,3S)-1-({4-[(4Z)-6-{[(3S,4S)-4-methyl-2-oxo-1-sulfoazetidin-3-yl]amino}-2-carboxy-2-methyl-6-oxo-4-aza-3-oxahex-4-en-5-yl]-1,3-thiazol-2-yl}amino)-1-oxo-3-(sulfoamino)but-2-yl]amino}-1-(2-amino-1,3-thiazol-4-yl)-2-oxoethylidene]amino}oxy)-2-methylpropanoic acid