Guillou C, Mary A, Renko DZ, Gras E, Thal C (2000) <br />Potent acetylcholinesterase inhibitors: design, synthesis and structure-activity relationships of alkylene linked bis-galanthamine and galanthamine-galanthaminium salts<br /><i>Bioorganic & Medicinal Chemistry Lett</i> <b>10</b>: 637<br /><br />