1-(6-Methoxyquinolin-4-yl)-3-((3R,4R)-3-vinylpiperidin-4-yl)propan-1-one (CAS# 84-55-9) is in intermediate in the synthesis of Quinotoxine Hydrochloride (Q753500), an isomer of quinine; occurs naturally as the d-form. Present in small quantities in cinchona barks. Vasodilator (cerebral).