Table 1. ¹H NMR (500 MHz) and ¹³C NMR (125 MHz) Data of Compounds 1–4 in CD₃OD^a.

	1		2		3		4
no.	δC	δH mult. (J in Hz)	δC	δH mult. (J in Hz)	δC	δH mult. (J in Hz)	δC	δH mult. (J in Hz)
1	131.9		131.8		132.4		131.6
2	112.5	6.91 d (2.0)	112.3	6.97 d (1.9)	112.3	6.90 d (1.8)	112.2	6.89 d (1.8)
3	148.9		149.1		148.9		148.9
4	147.4		147.5		115.7	6.76 d (1.8)	115.7	6.76 d (1.8)
5	119.5	6.70 d (8.2)	119.4	6.92 d (8.0)	147.2		147.2
6	121.8	6.61 dd (8.2, 2.0)	121.5	6.82 dd (8.0, 1.9)	121.7	6.76 d (1.8)	121.8	6.76 d (1.8)
7	81.9	4.46 d (6.4)	82.6	4.53 d (5.9)	82.0	4.60 d (5.9)	83.9	4.49 d (5.8)
8	85.9	4.27 m	86.5	4.26 td (5.9, 5.9, 4.0)	86.8	4.15 m	86.8	4.15 m
9	62.3	3.82 m	62.4	3.63 dd (11.7, 4.0)	62.2	3.90 dd (12.1, 4.7)	62.2	3.88 m
		3.84 m		3.42 m		3.65 m		3.63 m
1’	137.9		137.8		139.7		139.8
2’	114.2	6.75 d (2.0)	114.2	6.83 d (2.0)	107.1	6.50 brs	107.0	6.50 brs
3’	151.8		151.8		154.3		154.3
4’	147.3		148.2		135.0		135.1
5’	115.7	6.73 d (8.0)	116.0	6.77 d (8.1)	154.3		154.3
6’	122.1	6.79 dd (8.0, 2.0)	121.9	6.69 dd (8.1, 2.0)	107.1	6.50 brs	107.0	6.50 brs
7’	32.6	2.58 m	32.7	2.62 m	33.4	2.62 m	33.4	2.62 m
8’	35.5	1.78 m	35.5	1.81 m	35.4	1.82 m	35.4	1.82 m
9’	62.2	3.53 t (6.5)	62.3	3.56 t (6.5)	61.4	3.56 t (6.5)	61.3	3.56 t (6.5)
1”	65.4	3.41 m	65.7	3.42 m	65.6	3.43 m
2”	15.6	1.16 t (7.0)	15.6	1.13 t (7.0)	15.6	1.18 t (7.0)
3-OCH3	56.4	3.78 s	56.5	3.82 s	56.5	3.83 s	56.4	3.83 s
7-OCH3							57.3	3.26 s
3’-OCH3	56.5	3.75 s	56.6	3.83, s	56.6	3.75 s	56.6	3.76 s
5’-OCH3					56.6	3.75 s	56.6	3.76 s

^aAssignments aided by HSQC, ¹H-¹H COSY, and HMBC experiments.