3-Heterocyclicthiomethylcephalosporins

3-Heterothio derivatives of (.alpha.-thiocarbonylamino) cephalos

3-Heterothio derivatives of (.alpha.-thiocarbonylaminol)-7.alpha

3-Heterothio derivatives of (carbamoylthioacetyl)cephalosporins

3-Heterothio derivatives of (formylamino)acetylamino-7-alpha-met

3-Heterothio derivatives of [(alkoxycarbonyl)oxyacetyl]cephalosp

3-Heterothiomethyl-7.alpha.-methoxy-7.beta.-tetrazolylmethylthio

3-Heterothio[(oxyalkyl)thioacetyl]cephalosporin derivatives

3-Heterothio[(thioalkyl)thioacetyl]cephalosporanic derivatives

3-Hydrazino-cycloalkyl[c]pyridazines

3-Hydroxy and 3-acetoxy-6-triphenyl-methylaminopenams

3-Hydroxy carbazole derivatives

3-Hydroxy-3,4-dicarbamoylbutyric acid and salts

3-Hydroxy-3-(1,2,5-thiadiazolyloxyalkanol)-3,4-dihydro-2H-1,5-be

3-Hydroxy-3-aminoethyl .beta.-lactams

3-Hydroxy-5,6-benzomorphinan derivatives

3-Hydroxyalkyl phosphine oxide flame retardant compositions

3-Hydroxybenzyl-oxadiazolone and -thiadiazolone derivatives

3-Hydroxymethyl-7.beta.-(2-alkoxy-or benzyloxyimino-2-arylacetam

3-Imino-1,2,4-benzotriazine-1-oxides