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. Author manuscript; available in PMC: 2010 Jan 15.
Published in final edited form as: Bioorg Med Chem Lett. 2008 Nov 18;19(2):474–476. doi: 10.1016/j.bmcl.2008.11.044

Figure 1.

Figure 1

Arylidine anabaseines. Benzylidene anabaseine (BA, 1); 4-OH GTS-21, 2; pyridinyl methylene anabaseines, 3a–c; pyrrolyl methylene anabaseine, 4a,b. Whereas 4OH-GTS-21 presents a complex pattern of H-bond donation and acceptor function, compounds 3 and 4 are either H bond donors or acceptors, respectively.