1,2,3,4,10,14b-Hexahydro-2-methyldibenzo(c,f)pyrazino(1,2-a)azepine 2-oxide 62510-46-7 Dibenzo(c,f)pyrazino(1,2-a)azepine, 1,2,3,4,10,14b-hexahydro-2-methyl-, 2-oxide