Synonyms: N-Desmethylmirtazapine, (14bRS)-1,2,3,4,10,14b-Hexa-hydropyrazino[2,1-a]pyrido[2,3-c][2]benz-azepine, Pyrazino[2,1-a]pyrido[2,3-c][2]benzazepine, 1,2,3,4,10,14b-hexahydro- (9CI), Desmethylmirtazapine, N-Demethylmirtazapine, Normirtazapine, Mirtazapine-desmethyl