The disclosed 2H-pyrimido[4,5-d][1,3]oxazine-2,4(1H)-dione derivatives are intermediates useful in the production of 7,8-dihydro-2,5,8-trisubstituted-7-oxo-pyrido[2,3-d]pyrimidine-6-carboxyli c acid derivatives which are gastric anti-secretory agents and anti-allergic agents.
所披露的2H-
嘧啶并[4,5-d][1,3]噁嗪-2,4(1H)-二酮衍
生物是一种中间体,可用于生产7,8-二氢-2,5,8-三取代-7-氧代-
吡啶并[2,3-d]
嘧啶-6-
羧酸衍
生物,该衍
生物是胃抗分泌剂和抗过敏剂。