A full agonist of 5-HT2C receptors (Ki = 3.3 nM) that is ~6-fold less potent at 5-HT2A receptors (Ki = 18 nM) and 20-fold less potent at 5-HT2B receptors (Ki = 60 nM); produces dose-dependent decreases in food intake in 24-hour fasted normal Sprague-Dawley rats, diet-induced obese mice, and obese Zucker rats (ED50s = 1.9, 6.8, and 0.73 mg/kg, respectively)