Isolation of a hypotensive substance from seeds of Casimiroa edulis.

The hypotensive activity of the alcoholic and aqueous extracts of C. edulis has been previously reported. The present paper describes the pharmacological studies of a substance isolated from the alcoholic extract. Preliminary chemical and pharmacological data allowed a histamine-like compound to be proposed as the hypotensive principle. Studies were performed by means of in vitro and in vivo animal experiments.