derivatives with substituents in the 3-position of ceftriaxone , namely cefotaxime ( roussel maestretti s.p.a. , milan ) and ceftizoxime ( farmitalia carlo erba , milan ) , were much less susceptible to hydrolysis by c. diversus ula-27 enzymes ( 22 and 6 % of ceftriaxone hydrolysis , respectively ) , the hydrolysis rate being paralleled by differences in mic values .
C0007554
cefotaxime
C0007560
ceftizoxime