| 摘要 |
Cephalosporin antibiotics of the formula <IMAGE> wherein R is cyclohexadienyl, phenyl or substituted phenyl, 2-thienyl, 3-thienyl, 2-furyl or 3-furyl; R1 is a substituted phenyl having 1 to 4 hydroxy substituents or 1 to 3 amino substituents; and wherein Q is halo, methoxy, methyl or a group of the formula -CH2R2 wherein R2 is alkanoyloxy, carbamoyloxy, alkoxy, halo, pyridinium or substituted pyridinium or a group of the formula -SR3 wherein R3 is alkyl, phenyl, substituted phenyl or a 5 or 6 membered-heteroaryl group having from 1 to 4 heteroatoms selected from the group consisting of O, S, and N; are highly active broad spectrum antibiotics especially useful in the treatment of infections attributable to the gram-negative microorganisms.
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