NEW SALTS OF VARENICLINE AND IMPROVED PROCESS FOR THE PREPARATION OF VARENCILNE

摘要

The present invention relates to novel pharmaceutically acceptable salts selected from benzoate and 4-aminosalicylate salts of 7,8,9,10-tetrahydro-6,10-methano-6H-pyrazino[2,3-h][3]- benzazepine (Varenicline) of Formulae I and II. Formula I Formula II