Dihexa also known as N-hexanoic-Tyr-Ile-(6) aminohexanoic amide, is an oligopeptide drug derived from angiotensin IV that binds with high affinity to

hepato cyte growth factor (HGF) and potentiates its activity at its receptor, c-Met.

The compound has been found to potently improve cognitive function in animal models of Alzheimer's disease-like mental impairment.

In an assay of neurotrophic activity, Dihexa was found to be seven orders of magnitude more potent than brain-derived neurotrophic factor.