| abstract |
2-nitrogen heterocycloalkylthio-2-penem-3-carboxylic acid compounds of the formulan or a pharmaceutically acceptable salt thereof, wherein: R isn n X is imidazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl ortetrazolyl; R 1 is hydrogen or alkyl having 1-4 carbon atoms; R 2 is hydrogen or a group which forms an ester which is hydrolyzed in vivo; and alk is alkylene having 1-4 carbon atoms. nare useful as antibacterials for treating mammals. |