Estrogens, Catechol

**Definition:** 2- or 4-Hydroxyestrogens. Substances that are physiologically active in mammals, especially in the control of gonadotropin secretion. Physiological activity can be ascribed to either an estrogenic action or interaction with the catecholaminergic system.

**Tree numbers:** - D02.455.426.559.389.657.166.350 - D06.472.334.851.437.984

**Synonyms:** - Catechol Estrogens - Catecholestrogens