improvement in therapeutic compositions based on 4 - bone - 4h - pi i laugh 1.2 - pyrimidine - 3 - (1h -, tetra zol - 5 - carboxamide and their production process

摘要

A novel series of optionally substituted 4-oxo-4H-pyrido[1,2-a]pyrimidine-3-N-(1H-tetrazol-5-yl)carboxamides is provided for use as inhibitors of allergic reactions. The compounds exhibit antiallergy activity by both oral and parenteral routes of administration.