Purine derivatives with repeating unit

Purines useful for the potentiation of antibiotics

Pyrano derivatives, a process for their preparation and their us

Pyrano-heterocycles and medicaments containing these compounds

Pyranoquinolinones and analogs thereof

Pyrano[4,3-e]-as-triazines and corresponding 4-oxides

Pyrazine 4-oxide derivatives and process for their preparation

Pyrazine 4-oxide derivatives and process for their preparation

Pyrazine aldimine compounds as antimicrobial agents

Pyrazine substituted ureas

Pyrazinecarboxamides and processes for preparing same

Pyrazinium substituted cephalosporins

Pyrazino-carbazoles, process for the production thereof and phar

Pyrazinoisoquinolines as anthelmintic agents

Pyrazinyl-1,2,4-oxadiazole-5-ones, for treatment of edema, and p

Pyrazole derivatives

Pyrazole derivatives, pharmaceutical formulations thereof

Pyrazolo (1,5-c) quinazoline derivatives and related compounds

Pyrazolo [1,5-a] [1,3,5] triazines

Pyrazolo [1,5-C] quinazoline derivatives and their use in treati