1) Methyl ester 
Kynapcin is a general name for a number of dibenzofuranyl derivatives of the molecule polyozellin, present in the fungus Polyozellus multiplex. Like polyozellin, it inhibits prolyl endopeptidase, an enzyme that has a role in processing proteins (specifically, amyloid precursor protein) in Alzheimer`s disease. Chemicals that inhibit prolyl endopep....