Pyrimido-quinoxalines having antiallergic properties

Pyrimidobenzodiazepinones, their use and medicaments containing

Pyrimidone derivatives

Pyrimidone salt and its preparation

Pyrimidones having histamine H.sub.2 -antagonist activity

Pyrimido[1,2-a ]benzimidazole derivatives

Pyrimido[1,6-a]indole derivatives

Pyrimido[1,6-a]indoles, pharmaceutical preparations containing t

Pyrimido[5,6-b]quinoxaline-4-(3H)-one-2-carboxylic acid compound

Pyrimidyl thioureas useful for the treatment of hypertension and

Pyromellitic diimide complexes

Pyrrole amides and therapeutic use thereof

Pyrrolidines

Pyrrolidonecarboxylic acid therapeutic agents

Pyrrolo [3,4-c]quinoline compounds and pharmaceutical compositio

Pyrrolobenzoxazines, pyrrolobenzothiazines and process therefor

Pyrrolopyrimidinones and pyrroloimidazolones and their compositi

Pyrroloquinoline and benzoquinolizine compounds and antimicrobia

Pyrroloquinoxalines