Provided are a novel amidine derivative having an activated blood coagulation factor X inhibitory activity, a production method thereof, a production intermediate therefor, and a pharmaceutical composition containing the amidine derivative. An amidinoaniline derivative represented by the following formula (1-1) or a pharmaceutically acceptable salt thereof:
, and a pharmaceutical composition containing the amidinoaniline derivative or a pharmaceutically acceptable salt thereof.
cleavage of amyloid precursor protein by β-secretase (BACE1) is a key step in generating the N-terminal of β-amyloid (Aβ), which further forms into amyloid plaques that are considered as the hallmark of Alzheimer'sdisease. Inhibitors of BACE1 can reduce the levels of Aβ and thus have a therapeutic potential for treating the disease. We report here the identification of a series of small molecules bearing