An enzyme produced by bacteria that can inactivate β-lactam antibiotics.
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3-Acetoxymethyl-7-(benzothiazol-2-ylamino)-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester
4-[1-Dimethylamino-meth-(Z)-ylidene]-3-methyl-5,5,8-trioxo-7-(2-phenoxy-acetylamino)-5λ6-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid allyl ester
p-nitrobenzoyl 2β-(chloromethyl)-2α-methyl-6α-bromopenem-3α-carboxylate
(R)-N-(benzyloxycarbonyl)-O-(1-carboxyethoxycarbonyl)hydroxylamine