(R)-8-Chloro-1-methyl-3-nitroso-2,3,4,5-tetrahydro-1H-benzo[d]azepine; 1H-3-Benzazepine, 8-chloro-2,3,4,5-tetrahydro-1-methyl-3-nitroso-, (1R); N-Nitroso Lorcaserin; Lorcaserin Nitroso Impurity;