Remedies or preventives for diseases with a need for the enhancement of the production of nerve growth factor which contain as the active ingredient specific compounds having an activity of enhancing the production of nerve growth factor or salts thereof, agents for enhancing the production of nerve growth factor, or foods, drinks or feeds for enhancing the production of nerve growth factor; a method of enhancing the production of nerve growth factor which comprises administering the above compounds or salts thereof to mammals; and use of the above compounds or salts thereof in remedies or preventives for diseases with a need for the enhancement of the production of nerve growth factor, agents for enhancing the production of nerve growth factor, or foods, drinks or feeds for enhancing the production of nerve growth factor. Also, novel compounds having an activity of enhancing the production of nerve growth factor are provided.