6- and 4-substituted-1-azabicyclo(3.2.0)heptan-3, 7-dione-2-carb
6-(disubstituted amino)carbapenem compounds
6-amido-1-methyl carbapenems
6-amino-1,4-hexahydro-1H-diazepine derivatives
6-substituted thia-aza compounds
6-thiono-5,6-dihydro-dibenz[B,E] azepin-11-one-11-oximes