cis-3-<2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-(i-propoxyimino)acetamido>-4-methoxycarbonyl-2-azetidinone

sodium cis-3-<2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-(i-propoxyimino)acetamido>-4-methoxycarbonyl-2-azetidinone-1-sulfonate

sodium cis-3-<2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-(n-propoxyimino)acetamido>-4-methoxycarbonyl-2-azetidinone-1-sulfonate

Sodium; (2S,3S)-3-{2-[(Z)-allyloxyimino]-2-[2-(2-chloro-acetylamino)-thiazol-4-yl]-acetylamino}-2-methoxycarbonyl-4-oxo-azetidine-1-sulfonate

Sodium; (2S,3S)-3-{2-(2-amino-5-chloro-thiazol-4-yl)-2-[(Z)-methoxyimino]-acetylamino}-2-methoxycarbonyl-4-oxo-azetidine-1-sulfonate