2,2,2-Trifluoro-1-(6,7,9,10-tetrahydro-6,10-methano-8H-pyrazino[2,3-H][3]benzazepin-8-yl)ethanone230615-70-0100 % similar Varenicline tartrate375815-87-543 % similar Varenicline249296-44-443 % similar 2,2,2-Trifluoro-1-(1-piperidinyl)ethanone340-07-836 % similar 1-(Quinoxalin-6-ylcarbonyl)piperidine154235-83-331 % similar