Pyrazolo[1,5-a]pyrido[4,3-d]pyrimidin-9(4H)-one and derivatives

Pyrazolo[3',4'-2,3]pyrido[4,5-e]b-benzo-1,5-diazepinones

Pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine

Pyridazinium compounds and a process for their production

Pyridazinones

Pyridazo[1,2-a][1,2]diazepines

Pyridine adducts of oxazolidine and thiazolidine-derived carbodi

Pyridine compounds modifying proteins, polypeptides or polysacch

Pyridine containing isothiocyanobenzoxazoles

Pyridine derivative, processes of preparation and pharmaceutical

Pyridine dioxamic acids and esters

Pyridine esters of cyclopropane-carboxylic acid

Pyridine grignard derivatives

Pyridine n-oxides

Pyridine sulfur flavoring agents

Pyridinethiol-tin compound and process for the preparation of th

Pyridinium salts

Pyridinylidene guanidines

Pyrido (3,4-d)pyridazines

Pyrido derivatives