Pyrido(2,3-d) pyrimidinones

Pyridopyridazine derivatives

Pyridopyrrolobenzoxazine

Pyrido[1,2-a]pyrimidinone derivatives

Pyrido[2,3-c]-acridine-1-hydroxy-2-carboxylic acid derivatives

Pyrido[2-1-b]quinazolin-ones and their methods of preparation

Pyridyl alkyl esters of substituted phenoxy alkanoic acids havin

Pyridyl azo aryl metal complex dyes

Pyridyl containing 1-benzenesulfonyl triazoles

Pyridyl phenyl-carbamate rodenticides

Pyridyl substituted 7-.alpha.esters of 3 heterothio 7-acetamido

Pyridyl substituted aminoalkyl-thioureas and ureas

Pyridyl substituted ergoline derivatives

Pyridyl-4-methyl-succinimidocarbonate and process for its prepar

Pyridyl-azo-indolyl cationic dyes

Pyridyl-phosphonamidothioates, pyridylphosphorodiamidothioates,

Pyridyl-tetrahydropyrans and process for preparing same

Pyridylalkyl phenyl ureas and their N-oxides

Pyridylmethyl esters of N-(phenoxyalkanoyl)peptide derivatives

Pyrimidin(4)-yl-(thiono)-(thiol)-phosphoric-(phosphonic)-acid es