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(2007/10/02)2-[2-(Benzothiazol-2-yldisulfanyl)-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-methyl-but-2-enoic acid methyl ester
N-[2-(Benzothiazol-2-yldisulfanyl)-4-oxo-azetidin-3-yl]-2-phenoxy-acetamide
p-nitrobenzyl glyoxylate
N-[2-(Bis-methanesulfonyl-methylsulfanyl)-4-oxo-azetidin-3-yl]-2-phenoxy-acetamide