New 3,11-dihydro-6H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[4,3-d]pyrimidin-6 -one derivatives have the general formula ##STR1## The compounds are useful as anti-inflammatory agents.
                            新的3,11-二氢-6H-
吡唑并[1,5-a]
吡唑并[4',3':5,6]
吡啶并[4,3-d]
嘧啶-6-酮衍
生物具有一般公式 ##STR1## 这些化合物可用作抗炎药物。