Table 1.

¹H and ¹³CNMR data for 1–4 in CDCl₃.

No.	1		2		3		4
	δH a (J in Hz)	δC b	δH a (J in Hz)	δC b	δH a (J in Hz)	δC b	δH a (J in Hz)	δC b
1		169.6, C		161.6, C		170.0, C		169.9, C
3	4.72, m	76.5, CH	4.60, m	74.6, CH	4.63, m	76.3, CH	4.72, m	76.4, CH
4	2.87, m	33.6, CH2	2.92, dd, (16.2, 11.5)	35.4, CH2	3.10, dd, (16.8, 3.4)	27.3, CH2	2.86, m	33.7, CH2
			2.83, dd, (16.2, 2.9)		2.62, dd, (16.8, 11.5)
4a		141.5, C		144.0, C		122.6, C		141.8, C
5	6.42, s	107.6, CH	6.56, d, (2.0)	106.8, CH		134.3, C	6.32, s	106.7, CH
OH-5					5.20, s
6		162.5, C		162.6, C		153.1, C		162.9, C
OCH3-6					3.86, s	56.2, CH3
7	6.56, s	102.9, CH	6.61, d, (2.0)	100.1, CH	6.34, s	97.8, CH	6.19, s	102.0, CH
8		163.8, C		162.9, C		157.8, C		164.3, C
OCH3-8			3.94, s	56.3, CH3
8a		103.2, C		106.8, C		100.7, C		101.7, C
1′	1.98, m; 1.82, m	39.2, CH2	1.92, m; 1.83, m	39.5, CH2	1.95, m; 1.78, m	39.5, CH2	1.99, m; 1.87, m	39.4, CH2
2′	4.10, m	66.4, CH	4.10, m	66.2, CH	4.05, m	66.3, CH	4.13, m	66.5, CH
3′	1.69, m; 1.35, m	30.8, CH2	1.36, m	30.9, CH2	1.64, m; 1.29, m	30.8, CH2	1.73, m; 1.38, m	30.9, CH2
4′	1.70, m; 1.62, m	18.2, CH2	1.73, m; 1.64, m	18.3, CH2	1.65, m; 1.56, m	18.3, CH2	1.74, m; 1.65, m	18.2, CH2
5′	1.68, m; 1.32, m	31.3, CH2	1.72, m	31.0, CH2	1.63, m; 1.26, m	31.1, CH2	1.72, m; 1.36, m	31.0, CH2
6′	3.94, m	67.6, CH	3.96, m	67.7, CH	3.89, m	67.4, CH	4.02, m	67.9, CH
CH3-6′	1.21, d, (4.1)	19.1, CH3	1.22, d, (6.5)	18.9, CH3	1.14, d, (6.5)	19.2, CH3	1.25, d, (6.5)	18.9, CH3
1″	5.69, d, (3.5)	100.1, CH	5.77, d, (4.5)	100.5, CH
2″	4.29, brs	72.1, CH	4.34, m	72.2, CH
3″	4.19, brs	70.1, CH	4.24, dd, (6.2, 2.7)	70.4, CH
4″	4.21, brs	86.4, CH	4.28, dd, (6.2, 2.7)	86.5, CH
5″	3.78, d, (11.6); 3.74, d, (11.6)	62.3, CH2	3.89, dd, (12.1, 3.1); 3.81, dd, (12.1, 3.1)	62.5, CH2
8-OH	11.13, s				10.86, s		11.10, s

^a 600 MHz; ^b 150 MHz.