Synonyms: Pyrazino[2,1-a]pyrido[2,3-c][2]benzazepine, 1,2,3,4,10,14b-hexahydro-2-methyl-, 2-oxide, 1,2,3,4,10,14b-Hexahydro-2-methylpyrazino[2,1-a]pyrido[2,3-c][2]benzazepine 2-oxide,(14bRS)-2-Methyl-1,2,3,4,10-14b-hexahydropyrazino[2,1-a]pyrido[2,3-c][2]benzazepine 2-Oxide, Mirtazapine Imp. A (EP)