What is "pirisudanol"

n. The succinic acid ester of pyridoxine and of deanol, used to treat mild cognitive impairment, fatigue, and depression.

Pirisudanol (Mentis, Menthen, Mentium, Nadex, Nadexen, Nadexon, Pridana, Stivane), also known as pyrisuccideanol, is the succinic acid ester of pyridoxine (a form of vitamin B) and of deanol (DMAE). It has been used in Europe in the treatment of mild cognitive impairment as well as fatigue and depression.