7.beta.-Acyloxy-3-acetoxymethyl cephalosporins
7.beta.-Acyloxy-3-heterocyclicthiomethyl cephalosporins
7.beta.-Acyloxy-3-heterocyclicthiomethyl cephalosporins
7.beta.-Hydroxy-3-heterocyclicthio-methyl cephalosporin intermed
7.beta.-Phosphoramido-7.alpha.-methoxycephalosporanic acid deriv
7.beta.-[(2-Amino-1,2-dioxoethyl)amino]acyl cephalosporins
7.beta.-[2-Aryl-2-(etherified oximino)acetamido]-3-N-substituted
7.beta.-[2-Etherified oximino-2-(phenyl- or naphthylacetamido)]
7.beta.-[2-Etherified oximino-2-(thienyl-, furyl- or pyridylacet
7.beta.-[[[(2-Cyanomethyl)amino]-1,2-dioxoethyl]amino]acyl cepha
7.beta.-[[[2-Acylamino]-1,2-dioxoethyl]amino]acyl cephalosporins
7H-1,3,4-Thiadiazolo-[3,2-a]-pyrimidin-7-one-5-carboxylic compou
7[-2-Alkoxyamino(acetamido)]cephalosporin derivatives
7[2-(2-Aminothiazol-4-yl)-2-alkoxyimino]acetamido 3[4-alkyl-5-ox
7[[(1-Pyrrollyl)7 acetyl]amino]cephalosporin derivatives
8-Oxo-2-oxa-1-azabicyclo(4.2.0)octane-3-carboxylic acids
8-Oxo-3-oxa-1-azabicyclo[4.2.0]octanes containing a chiral cente
8-Oxo-4-thia-1-azabicyclo (4.2.0)-oct-2-ene derivatives
8-{4-[3-(5-fluoro-1H-indol-3-YL)-Propyl]-Piperazin-1-YL}-2-m...
9-[(substituted glycyl)amido)]-6-demethyl-6-deoxytetracyclines