al·pha-to·coph·e·rol 
(ăl′fə-tō-kŏfə-rôl′, -rōl′)
(ăl′fə-tō-kŏfə-rôl′, -rōl′)n.
An alcohol, C29H50O2, that is one of the components of vitamin E and is present in vegetable oils, nuts, and seeds or produced synthetically. It is the predominant form of vitamin E in the human body and in supplements.