4-Acetyl-3,3,5,5 tetraalkylcyclohexanones

4-Acylaminophenylacetamidines and a method for their preparation

4-Acylthioazetidinone intermediates for antibacterial agents

4-Alkoxy or hydroxy derivatives of 2H-pyrazolo[3,4-b]pyridine-5-

4-Alkoxy-3,5-diamino-.alpha.,.alpha.,.alpha.-trifluoromethyl-ben

4-Alkoxy-N-butyraldehyde preparation

4-Alkyl-1,2-dimethyl-3,5-diphenylpyrazolium salts and derivative

4-Alkyl-1,4-diaza-5-oxo-cycloheptanes and their 1-oxyls

4-Alkyl-4-naphthyl butenes

4-ALKYL-4-NAPHTHYL-BUTANES

4-Alkyldioxyalkylene-5-benzylpyrimidines

4-Allyl azetidinone intermediate for .beta.-lactam antibacterial

4-Amino (or halo or hydroxy or hydrazino)-2-(pyridinyl)pyrimidin

4-Amino derivatives of pyrozolo[1,5-a]quinoxaline-3-carboxylic a

4-Amino pyridazinium compounds having pharmacalogical properties

4-Amino-2-phenyl-6-thiopryimidines

4-Amino-3,5-dinitrobenzenesulfenamides and sulfinamides

4-Amino-6-nitro derivatives of 2H-3,4-dihydrobenzo[b]pyrans

4-Amino-pyrimidine derivatives

4-Aminoalkyl-7-hydroxy-2(3H)-indolones