VCT52H: Varenicline Dioxo Impurity

4,6,7,8,9,10-Hexahydro-6,10-methano-6H-pyrazino[2,3-h][3]benzazepine-2,3-dione HCl ;

CAS # 357424-07-8 ;

C13H13N3O2 (base) ; Mol. Wt.: 243.26 ;

C13H14ClN3O2 (HCl) ; Mol. Wt.: 279.72 ;