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. Author manuscript; available in PMC: 2016 Apr 24.

Published in final edited form as: J Nat Prod. 2015 Mar 17;78(4):789–796. doi: 10.1021/np5010328

Table 1.

¹H (400 MHz) NMR Spectroscopic Data for Compounds 1-4 (δ in ppm, J in Hz)^a

	1^b	2^c	3^c	4^b
position	δ_H (J in Hz)	δ_H (J in Hz)	δ_H (J in Hz)	δ_H (J in Hz)
1	2.75, ddd (4.5, 12.4, 12.4)	2.68, ddd (4.8, 12.1, 12.18)	2.92, d (11.8)	2.45, dd (0.8, 11.5)
	1.90, dddd (4.1, 4.2, 12.2, 12.4 )	1.88, dddd (4.2, 4.4, 12.2, 12.5)	1.86, dd (1.5, 11.8)	2.31, dd (1.6, 11.5)
2	2.28, ddd (4.5, 12.0, 14.0)	2.21, m^d
	2.05, ddd (4.5, 12.1, 14.0)		-	-
3	-	-	3.75, d (11.0)	3.95, d (1.0)
5	2.37, dd (2.2, 8.0)	2.26, dd (2.2, 8.0)^d	2.24, dd (1.3, 5.8)	2.19, dd (1.1, 5.8)
6	5.19, ddd (5.7, 8.0, 9.7)	5.11, ddd (6.0, 8.1, 9.7)	5.17, ddd/br quintet-like (5.1, 5.1, 10.2)	5.21, ddd/br quintet-like (4.9, 5.7, 10.2)
7	4.22, dd (9.7, 17.3)	4.15, dd (9.9, 17.2)	4.05, dd (9.9, 17.4)	4.03, dd (9.9, 17.3)
	3.03, dd (5.6, 17.2)	2.98, dd (5.9, 17.1)	2.98, dd (4.8, 17.4)	2.93, dd (4.7, 17.3)
11	7.23, d (8.2)	6.57, s	6.52, s	6.65, s
12	7.49, dd (0.9, 8.1)	-	-	-
15	6.81, d (2.2)	6.83, d (2.2)	6.84, d (2.2)	6.84, d (2.2)
16	7.75, d (2.2)	7.53, d (2.2)	7.52, d (2.2)	7.64, d (2.2)
18	1.44, s	1.44, s	1.60, s	2.14, s
20	4.12, dd (3.7, 9.6)	4.14, dd (3.7, 9.7)	4.25, dd (1.5, 9.0)	4.18, dd (1.6, 8.6)
	3.77, dd (2.2, 9.6)	3.82, dd (2.2, 9.7)	3.76, dd (1.5, 9.0)	3.54, dd (1.5, 8.6)
OCH₃	-	3.92, s	3.91, s	3.94, s
2-OH	-	-	4.29, s	-
3-OH	-	-	5.01, d (10.6)	-

^a

For CH₂, the deshielded signal was assigned as H_a, and the shielded signal as H_b.

^b

Data measured in methanol-d₄.

^c

Data measured in CDCl₃.

^d

Signal was partially obscured.