Purine derivatives
Purine derivatives
Purine derivatives
Purine derivatives and their use as bronchodilators
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