| 摘要 |
The present invention relates to an improved process for preparing varenicline, or pharmaceutically acceptable salts or solvates thereof, and in particular an improved process for preparing varenicline, or pharmaceutically acceptable salts or solvates thereof, employing intermediate compounds 1,2,3,4-tetrahydro-1,4-methano-naphthalene- cis -2,3-diol (a compound of Formula III), and / or indane-1,3-dicarbaldehyde (a compound of Formula IV) as prepared by a process of the present invention.
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