The invention relates to triazolo[4,3-a]pyrido[2,3-d]pyrimidine-5-one derivatives, their regioisomers, their salts and their solvates if they exist, their preparation, compositions containing them and their use. These derivatives possess properties inhibiting PDE4 and/or the release of TNF&agr;, and may therefore be used for the treatment or prevention of numerous conditions by virtue of the inhibition of the PDE4 enzyme and the resulting increase in the cAMP level.
本发明涉及三唑并[4,3-a]
吡啶[2,3-d]
嘧啶-5-酮衍
生物及其区异构体、盐和溶剂化物(如果存在)、其制备、含有它们的组合物和它们的用途。这些衍
生物具有抑制PDE4和/或TNF&agr;释放的特性,因此可以通过抑制PDE4酶并导致c
AMP水平增加来用于治疗或预防多种疾病。