+++Thanks_ddtadd_1 article from sciencedirect

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1. Synthesis and binding of 6,7,8,9-tetrahydro-5H-pyrido[3,4-d]azepine and related ring-opened analogs at central nicotinic receptors Original Research Article
European Journal of Medicinal Chemistry, Volume 34, Issue 2, February 1999, Pages 177-190
Yun-Xing Cheng, Malgorzata Dukat, Matthew Dowd, Wolfgang Fiedler, Billy Martin, Mohamed Imad Damaj, Richard A Glennon
European Journal of Medicinal Chemistry (1999), 34, (2), 177-190.

DOI:

http://dx.doi.org/10.1016/S0223-5234(99)80051-8

link:

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http://www.sciencedirect.com/science/article/pii/S0223523499800518

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