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.
本文介绍了3-氧代-5H-
嘧啶并[2,1-c][1,4]苯并噁嗪衍
生物,其在1号位置可选地被氢氧甲基、羧基或低碳基酯基所取代,在8或9号位置可选地被低碳基或卤素所取代。这些衍
生物是抗过敏剂,提供了它们的制备和使用方法。