249296-44-4 7,8,9,10-Tetrahydro-6,10-methano-6H-pyrazino(2,3-h)(3)benzazepine CP 526555 Vareniclene 6,10-Methano-6H-pyrazino(2,3-h)(3)benzazepine, 7,8,9,10-tetrahydro-