Table 2.

¹H (400 MHz) NMR Spectroscopic Data for Compounds 5-7 (δ in ppm, J in Hz)^a

	5b	6b	7c
position	δH (J in Hz)	δH (J in Hz)	δH (J in Hz)
1	1.81-1.88, md	1.82, br d (8.6)d	1.75, dddd (3.3, 3.3, 10.3, 10.3)
	1.65, ddd/dt-like (6.6, 11.7, 11.7)	1.67, ddd (3.5, 9.5, 12.8)	1.60-1.67, md
2	2.10, ddd (6.2, 12.0, 12.8)	2.03-2.08, md	1.95-2.01, md
	1.81-1.88, md	1.82, br d (8.6)d
5	2.32, dd (1.3, 5.4)	2.03-2.04, md	1.98-2.01, md
6	4.79, ddd/br t-like (0.8, 5.3, 5.4)	4.71-4.77, md	4.67, ddd/br t-like (0.9, 5.0, 5.2)
7	2.54, ddd (1.1, 5.2, 16.1)	2.56-2.64, md	2.20-2.25, m
	1.94, ddd (4.1, 12.9, 16.2)		1.23-1.29, m
8	3.26, ddd/dt-like (4.8, 4.8, 12.8)d	-	2.73-2.80, m
9	2.20, ddd/dt-like (4.2, 4.2, 13.9)	2.04-2.08, md	1.57-1.62, md
11	2.59, dd (13.9, 17.0)	2.81, dd (4.8, 16.9)	1.82-1.83, m
	2.40, dd (4.1, 17.0)	2.52-2.62, md	1.32-1.40, md
12			2.89, ddd (1.5, 4.6, 14.4)
	-	-	2.27-2.35, m
14	-	-	4.88, dd (1.0, 6.3)
15	6.65, d (2.0)	6.66, d (2.0)	5.81, s
16	7.53, d (2.0)	7.63, d (2.0)	-
18	1.36, s	1.29, s	1.33, s
20	4.39, dd (3.4, 9.6)	4.71-4.77, md	4.42, dd (3.6, 9.6)
	3.65, dd (1.7, 9.5)	3.67, dd (1.9, 10.1)	3.65, dd (1.6, 9.5)

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

^bData measured in methanol-d₄.

^cData measured in CDCl₃.

^dSignal was partially obscured.