The present application relates to compounds of formula (I), (Ia), or (Ib) and their pharmaceutical compositions/preparations. This application further relates to methods of treating or preventing Aβ-related pathologies such as Down's syndrome, β-amyloid angiopathy such as but not limited to cerebral amyloid angiopathy or hereditary cerebral hemorrhage, disorders associated with cognitive impairment such as but not limited to MCI (“mild cognitive impairment”), Alzheimer's disease, memory loss, attention deficit symptoms associated with Alzheimer's disease, neurodegeneration associated with diseases such as Alzheimer's disease or dementia, including dementia of mixed vascular and degenerative origin, pre-senile dementia, senile dementia and dementia associated with Parkinson's disease.
本申请涉及式(I)、(Ia)或(Ib)化合物及其药物组合物/制剂。本申请还涉及治疗或预防 Aβ 相关病症的方法,如唐氏综合征、β-淀粉样血管病变,如但不限于脑淀粉样血管病变或遗传性脑出血、与认知障碍相关的疾病,如但不限于 MCI("轻度认知障碍")、阿尔茨海默病、记忆力减退、与阿尔茨海默病相关的注意力缺陷症状、与阿尔茨海默病或痴呆等疾病相关的神经变性,包括血管性和变性混合性痴呆、老年前期痴呆、老年性痴呆和与帕
金森病相关的痴呆。