Table 1.

¹H and ¹³C NMR spectroscopic data for 1and 2

No.	1a		2b
	δC type	δH mult. (J)	δC type	δH mult. (J)
1	77.230	5.610 br s	55.157	4.427 m
3	d	3.00–4.00 m	38.95	3.35, 3.25 c
4	29.715	3.00-4.00 m	24.88	2.962, 2.858 m
4a	d	–	122.72	–
5	111.109	6.849 s	115.35	6.727 s
6	147.196	–	147.05	–
7	149.079	–	144.81	–
8	110.966	6.649 s	11.85	6.563 s
8a	d	–	124.72	–
α	d	–	38.79	3.152,3.025dd (18,8)
1′		–	126.31	–
2′	131.342	7.028 d (10.5)	130.566	7.132 d (10)
3′	114.072	6.838 d (10.5)	111.813	6.786 d (10)
4′	158.906	–	156.33	–
5′	114.072	6.838 d (10.5)	111.813	6.786 d (10)
6′	131.342	7.028 d (10.5)	130.566	7.132 d (10)
6-OCH3	55.455	3.884 s	55.526	3.752 s
7-OCH3	55.326	3.798 s	–	–
4′-OCH3	55.906	3.468 s	–	–
N-CH3	40.046	2.885 s	–	–

^a Data were recorded in CDCl₃ 500 MHz (1H) and 75 MHz (¹³C)

^b Data were recorded in DMSO-d₆ at 500 MHz (¹H) and 75 MHz (¹³C)

^c Overlapped

^d Not detected but appears in HMBC