NEW PEPTIDE AND HYPOTENSIVE AGENT

摘要

NEW MATERIAL:Formula I to formula III and salts thereof. USE:A hypotensive agent. The above-mentioned compounds have angiotensin conversion enzyme inhibiting action and vasodepressor action and have extremely high safeness and are usable also as a physiologically functional food in addition to medicine. PREPARATION:Sap of fig tree is preferably subjected to heat treatment in order to block action of protease and then subjected to solid liquid separation. Then treatment of ultrafiltration, gel filtration, etc., is applied to the resultant liquid to remove a high-molecular substance and then the resultant aqueous solution is subjected to separation and purification with a column chromatography and high performance liquid chromatography to provide the aimed material.