The present invention provides a compound having a PDE2A selective inhibitory action, which is useful as an agent for the prophylaxis or treatment of schizophrenia, Alzheimer’s disease and the like.The present invention is a compound represented by the formula (1): wherein each symbol is as described in the specification, or a salt thereof.本發明提供具有PDE2A選擇性抑制作用之化合物,該化合物有用於作為用以預防或治療精神分裂症、阿茲海默症等之藥劑。本發明為式(1)所示化合物(1)或其鹽:其中各符號如說明書所揭示。由於本案的圖為實驗數據,並非本案的代表圖。故本案無指定代表圖。
