(2S)-2α-(Carbamoyloxymethyl)-3α-[[(Z)-(2-amino-4-thiazolyl)[(carboxymethoxy)imino]acetyl]amino]-4-oxoazetidine-1-sulfonic acid

[[[(Z)-2-[[(2S)-2α-[[(Aminocarbonyl)oxy]methyl]-4-oxo-1-sulfoazetidin-3α-yl]amino]-1-(2-aminothiazol-4-yl)-2-oxoethylidene]amino]oxy]acetic acid

[[[(Z)-2-[[(2S,3S)-2-[[(Aminocarbonyl)oxy]methyl]-4-oxo-1-sulfoazetidin-3-yl]amino]-1-(2-amino-4-thiazolyl)-2-oxoethylidene]amino]oxy]acetic acid

Acetic acid, [[(Z)-[2-[[(2S,3S)-2-[[(aminocarbonyl)oxy]methyl]-4-oxo-1-sulfo-3-azetidinyl]amino]-1-(2-amino-4-thiazolyl)-2-oxoethylidene]amino]oxy]-