Sophoridine, a natural anticancer drug, has been used in China for decades. A series of novel N-substituted Sophoridinic acid derivatives were synthesized and evaluated for their cytotoxicity with 1 as the lead.

Amyloid β-Protein (10-20) is a fragment of Amyloid-β peptide, maybe used in the research of neurological disease.Amyloid β protein fragment containing the α-secretase processing site (Lys16-Leu17 bond). It also contains the HHQK domain (residues 13-16) responsible for binding to microglial cells.

This is an N-terminal fragment of beta amyloid. It consists of amino acid residues 1 to 9. Truncated beta amyloid peptide (10-40) still forms amyloid fibrils and shows fibril polymorphism.