3,1 Benzoxazine 2,4-dione

3,11-Dihydro-6H-pyrazolo[1,5-a]pyrazolo[4 ',3':5,6]-pyrido[4,3-d

3,3-Dichloro-2-azetidinone derivatives having antiinflammatory a

3,3-Dichloro-2-azetidinone derivatives having basic substituents

3,4-Dihydro-2-methyl-4-oxo-2H-1,2-benzothiazine-3-carboxylic aci

3,5-dioxa-12-azawurtzitane compound and process of preparing...

3,5-dioxa-12-azawurtzitane compound and process of preparing...

3,6-Dihydro-2H-1,2-oxazines

3,7-Disubstituted cephalosporins

3,7-Disubstituted-2 or 3-cephem-4-carboxylic acid compounds

3-(1-Halo-2-oxoethyl)cephalosporin intermediates

3-(4-amidopyrrol-2-ylmethlidene)-2-indolinone derivatives as...

3-(Carbamoyl)pyridino derivatives of 7a-methoxy ureidocephalospo

3-(Disubstituted)aminoisothiazolo[3,4-d]pyrimidines

3-6 Bis(morpholinoalkylthio)-pyridazines

3-Acetoxymethyl cephalosporins having at position-7 a carboxy su

3-Acetyltetrahydro-2-(nitromethylene)-2H-1,3-thiazine

3-Carbamoyl substituted-7-ureido substituted cephalosporins

3-Carbamoyloxymethyl or N-methyl-carbamoyloxymethyl-7-[2-carboxy

3-Cephem intermediates