. Author manuscript; available in PMC: 2011 Nov 29.

Published in final edited form as: J Nat Prod. 2010 Oct 12;73(11):1873–1878. doi: 10.1021/np100503q

Table 2.

¹H NMR Chemical Shifts of Compounds 3–6^a

position	3	4	5	6
1	1.48^b	1.62^b	1.63^b	3.88, m
	1.95, m	1.82^b	1.82^b
2	2.46^b	2.65, td (14.0, 4.6)	2.67, td (14.0, 4.5)	H_α, 2.72, dd (6.1, 17.3)
		2.50, ddd (14.2, 5.7, 3.5)	2.52, ddd (14.2, 5.7, 3.5)	H_β, 2.72, dd (12.1, 17.3)
5	1.35^b	1.78^b	1.80^b
6	1.50^b	1.43^b	1.44^b	6.46, s
		1.77^b	1.77^b
7	1.42^b	1.30^b	1.31^b
8				2.30, m
9	1.43^b	1.42^b	1.42^b	H_α, 1.43,ddd (6.0, 5.7, 12.5)
				H_β, 2.16, ddd (2.0, 5.0, 12.8)
11	1.35^b	1.55^b	1.55^b	2.46, hep (6.6)
	1.55^b	1.26^b	1.26^b
12		1.19^b	1.10^b	1.12, d (6.8)
		2.03, brd (10.0)	1.86^b	1.12, d (6.8)
13	2.07, td (12.0, 3.0)	1.75^b	1.70^b
14				1.09, s
15	1.58^b	1.10^b	1.10^b	4.45, brs
	1.20^b	1.45^b	1.45^b
16	1.60^b	1.30^b	1.30^b
	1.75^b	1.78^b	1.78^b
17	3.48, d (11.4)	1.79^b	1.91^b
18	1.07, s	1.02, s	1.05, s
19	0.96, s	1.08, s	1.10, s
21		1.15, s	1.17, s
22	H_α1.48^b	1.71^b	1.71^b
	H_β2.03, td (13.2, 4.8)
23	H_β 1.56^b	1.80^b	1.88^b
	H_α 1.73^b		1.82^b
24	3.26, d (12.0)	3.77, t (7.2)	3.65, dd (9.9, 5.6)
26	1.16, s	1.20, s	1.21, s
27	1.20, s	1.10, s	1.13, s
28	1.08, s	1.48, s	1.50, s
29	1.03, s	1.40, s	1.42, s
30	0.98, s	0.86, s	0.88, s

Measured at 600 MHz and obtained in CDCl₃ with TMS as internal standard; J values (Hz) are given in parentheses. Assignments supported with ¹H-¹H COSY, HSQC, and HMBC spectra.

Multiplicity patterns unclear due to signal overlapping.