D-KLVFFA is the inhibitor of Amyloid-β assembly, with the IC50 of 2.6 μM, that can be used in Alzheimer's disease study[1].
References
[1] Robert J Chalifour, et al. Stereoselective interactions of peptide inhibitors with the beta-amyloid peptide. J Biol Chem. 2003 Sep 12;278(37):34874-81. DOI:10.1074/jbc.M212694200