The present invention is directed to arylpyrrolopyridine derivatives of formula (A) The compounds are considered useful for the treatment of diseases associated with LRRK2 such as Lewy body dementia, Parkinson’s disease or cancer.本發明係針對式(A)之芳基吡咯并吡啶衍生物。認為該等化合物適用於治療與LRRK2有關之疾病,諸如路易體癡呆、帕金森氏病或癌症。