has role has functional parent independent continuant primary alcohol 2-(4-hydroxyphenyl)ethanol antioxidant metabolite catechols antineoplastic agent hydroxytyrosol CHEBI:68889 A member of the class of catechols that is benzene-1,2-diol substituted by a 2-hydroxyethyl group at position 4. Isolated from <em>Olea europaea</em>, it exhibits antioxidant and antineoplastic activities.