This invention discloses novel 1-oxo-5H-pyrimido[2,1-c][1,4]benzoxa(or thia)zine-2-carboxylic acid lower alkyl esters, derivatives thereof, process for their preparation, pharmaceutical compositions thereof and methods for using the compounds. The compounds of this invention are useful in the treatment of anaphylactic reactions and allergic conditions in a mammal.
本发明披露了新型的1-氧代-5H-
嘧啶并[2,1-c][1,4]苯并
噁唑-2-
羧酸较低烷基酯,其衍
生物,其制备方法,其制药组合物以及使用该化合物的方法。本发明的化合物在哺乳动物中治疗过敏反应和过敏症状中有用。