| 摘要 |
PURPOSE:To massively and readily prepare an extract having an angiotensin transferase-inhibiting activity and capable of responding to an expectation as an antihypertensive agent by extracting the leaves of Eucommia ulmoides and preparing from the extract solution. CONSTITUTION:The leaves of Eucommia ulmoides are extracted and the objective extract is prepared from the extract solution. The Eucommia ulmoides is a deciduous plant native to Chinese and the leaves thereof are suitably used as a raw material for the extraction. The leaves are first naturally dried and the extraction solvent includes methanol and acetone. When the prepared extract is drunk, the extraction solvent is preferably water. The extraction is performed several times under heating or at room temperature. The extraction solution is passed through an adsorption column for the adsorption on an adsorbent and subsequently desorbed with a desorption solvent, followed by concentrating and drying the desorbed solution to provide the objective extract. |
