Provided is a fused tri-cyclic compound as PDE3/PDE4 dual inhibitor, and a use thereof in the preparation of drugs for PDE3/PDE4 associated diseases, particularly in medicinal functions such as chronic obstructive pulmonary disease (COPD). Provided are specifically a compound of formula (I) and a pharmaceutically acceptable salt thereof.
本发明提供了一种作为 PDE3/PDE4 双重
抑制剂的融合
三环化合物,以及其在制备治疗 PDE3/PDE4 相关疾病,特别是慢性阻塞性肺病(
COPD)等药物功能中的用途。具体提供了式(I)化合物及其药学上可接受的盐。