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