Table 1.

NMR spectral data for compounds 1–2 (in CD₃OD) and 3 (in CDCl₃)

Position	1		2		3
	δ C	δH (J in Hz)	δ C	δH (J in Hz)	δ C	δH (J in Hz)
1	111.6, CH2	4.73, br s	111.6, CH2	4.72, br s	111.6, CH2	4.72, br s
		4.66, br s		4.64, br s		4.60, br s
2	146.6, C		147.3, C		145.3, C
3	50.1, CH	2.34, m	50.5, CH	2.34, m	48.7, CH	2.18, m
4	27.9, CH2	1.96, m	27.9, CH2	1.96, m	26.9, CH2	1.94, m
		1.59, m		1.59, m		1.54, m
5	38.6, CH2	2.14, m	38.4, CH2	2.14, m	37.5, CH2	2.11, m
		1.87, m		1.87, m		1.80, m
6	89.2, C		89.4, C		89.3, C
7	44.5, CH	2.02, m	44.2, CH	2.02, m	43.3, CH2	2.03, m
8	17.1, CH2	2.22, m	17.4, CH2	2.22, m	15.6, CH2	2.33, dd (1.4, 17.3)
		2.18, m		2.18, m		2.15, m
9	106.3, C		106.4, C		102.9, C
10	164.7, C		171.7, C		172.9, C
11	67.4, CH	4.28, br t (3.3)	79.4, CH	3.84, dd (4.4, 12.1)	78.5, CH	4.54, d (5.9)
12	39.3, CH2	2.32, m	37.4, CH2	2.30, m	44.1, CH2	2.45, dd (5.9, 10.7)
		2.06, m		2.03, m		2.02, d (10.7)
13	68.6, CH	4.41, dd (5.0, 11.4)	66.3, CH	4.48, dd (5.1, 9.1)	81.8, C
14	201.2, C		198.7, C		198.8, C
2′	19.1, CH3	1.69, s	19.0, CH3	1.69, s	19.1, CH3	1.64, s
6′	23.5, CH3	1.34, s	23.0, CH3	1.34, s	23.3, CH3	1.31, s
OCH3			58.4, CH3	3.50, s
OCH2					70.7, CH2	3.80, d (8.3)
						3.48, d (8.3)
–OH		3.39, s		3.39, s		4.22, s