the intrinsic reactivity of delta 2- and delta 3-deacetoxy-7-phenylacetamidocephalosporanates , penicillanate , unsubstituted , 2-methyl- and 2-phenyl-penems and other beta-lactam antibiotics has been expressed in terms of the second-order rate constant ( m-1.s-1 ( oh- ) ) for the hydrolysis of the beta-lactam amide bond by oh- at 37 degrees c .
C0026458
beta-lactam antibiotics
C0282215
beta-lactam