Description_x000D_ Biochem/physiol Actions_x000D_ Agonist at vascular serotonin receptors; partial agonist at α-adrenergic and dopamine D2 receptors; vasoconstrictor._x000D_ Features and Benefits_x000D_ This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more._x000D_ Legal Information_x000D_ LOPAC is a registered trademark of Sigma-Aldrich Co. LLC