英文别名Hydroxy Varenicline; 1,6,7,8,9,10-Hexahydro-6,10-methano-2H-pyrazino[2,3-h][3]benzazepin-2-one; (+)-5,8,14-triazatetracyclo[10.3.1.02,11.04,9]hexadeca-2(11),3,7,9-tetraen-6-one; Varenicline Hydroxy Impurity; 6,10-Methano-2H-pyrazino[2,3-h][3]benzazepin-2-one, 1,6,7,8,9,10-hexahydro-