. Author manuscript; available in PMC: 2010 Mar 15.

Published in final edited form as: Bioorg Med Chem. 2008 Nov 5;17(6):2189–2198. doi: 10.1016/j.bmc.2008.10.077

Table 4.

Calculated NMR shifts for 6 and 8 compared to observed data

Position	Synthetic product	6		8
	Observed δ_c	Calcd δ_c	Δδ	Calcd δ_C	Δδ
CH₃	55.7	53.3	-2.4	43.8	-11.9
C-2	57.4	59.9	2.5	58.9	1.5
C-3	33.5	34.8	1.3	38.4	4.9