7-(Syn-{60 -alkoxy-iminofuryl)acetamido-3-(2-methyl-2,3-dihydro-s-triazolo{8 4,3-b{9 pyridazin-3-on-6-ylthiomethyl)-3-cephem-4-carboxylic acids

摘要

Cephalosporins in a series having the formula <IMAGE> +TR <IMAGE> wherein R1 is alkyl containing 1-4 carbon atoms or a nontoxic pharmaceutically acceptable salt thereof, were synthesized and found to be potent antibacterial agents especially when in the form of the syn isomers essentially free of the corresonding anti isomer.