3-Oxo-5H-pyrimido[2,1-c][1,4]benzoxazine derivatives, optionally substituted with a hydroxymethyl, carboxy or loweer alkoxycarbonyl at position 1 and optionally substituted at positions 8 or 9, with a lowr alkyl or halo are disclosed. The derivatives are antiallergy agents and methods for their preparation and use are given.
本发明公开了3-Oxo-5H-
嘧啶并[2,1-c][1,4]苯并噁嗪衍
生物,其在位置1处可选地被羟甲基、羧基或较低的烷氧羰基取代,并且在位置8或9处可选地被较低的烷基或卤素取代。这些衍
生物是抗过敏剂,提供了其制备和使用的方法。