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. Author manuscript; available in PMC: 2009 Oct 16.
Published in final edited form as: Org Lett. 2008 Sep 25;10(20):4681–4684. doi: 10.1021/ol8020176

Table 3.

Three-Bond 1H-C13 Coupling (HMBC) in compounds 3 and 11-14

H 3 11 12 13 14
H-2 C-12 C-10 & C-11 C-10 & C-11 C-10 & C-11 C-10 & C-11
H-5 C-6a C-6a & C-11 C-6a & C-11 C-6a & C-11 C-6a & C-11
H-12 C-2, C-14 & C-18 -- C-2, C-14 & C-18 -- --
H-14 & C-18 C-12 -- C-12 -- --
H-1′ C-6a, C-8, C-3′ & C-7′ C-8, C-3′ & C-7′ C-8, C-3′ & C-7′ C-8, C-3′ & C-7′ C-8, C-3′ & C-7′H-
H-3′ & H-7′ C-1′ C-1′ C-1′ C-1′ C-1′
H-9(N) -- C-8*, C-9a* C-8*, C-9a* C-8*, C-9a* C-8*, C-9a*
H-2″ & H-6″ -- C-9a C-9a C-9a C-9a (H-2″)
*

Two-bond coupling enhancement obaserved.