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

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

(2S,3S)-3-{2-[5-Chloro-2-(2-chloro-acetylamino)-thiazol-4-yl]-2-[(Z)-methoxyimino]-acetylamino}-4-oxo-azetidine-2-carboxylic acid methyl ester

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

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