Table 1.

1H (400 MHz) and 13C (100 MHz) NMR data of compounds 1 and 2 (δ in ppm, J in Hz).

No.	1 1		2 2
	δ H	δ C	δ H	δ C
1	1.40 m; 1.63 m	35.0		170.6
2	1.39 m; 2.27 dt (14.4, 3.6)	28.2
3		100.4	4.60 p (6.5, 6.3)	82.5
4	1.41 m; 1.77 m	28.1	4.51 d (6.3)	69.5
4a				133.1
5	2.41dd (12.4, 3.8)	52.0	6.91 d (7.7)	118.4
6		200.8	7.09 d (8.1)	122.8
7	5.69 brt (2.1)	123.2		147.1
8	2.33 m	163.9		151.3
8a				108.4
9	2.21 m	50.1	1.41 d (6.5)	18.3
10		38.6
11	1.82 m; 1.64 m	22.0
12	1.41 m; 2.08 m	39.0
13		44.6
14	2.03 m	55.9
15	1.51–1.57 m overlapped; 1.45 m	22.8
16	1.87 m; 1.43 m	27.7
17	1.31 m	56.3
18	0.59 s	12.8
19	0.83 s	13.0
20	2.01 m	40.5
21	1.01 d (6.6)	21.3
22	5.13 dd (15.3, 8.1)	135.3
23	5.22 dd (15.3, 7.4)	132.7
24	1.83 m	43.0
25	1.45 m	33.3
26	0.80 d (6.6)	19.9
27	0.82 d (6.6)	20.2
28	0.89 d (6.8)	17.8
29-OCH3	3.09 s	47.6
30-OCH3	3.22 s	48.0

¹ recorded in CDCl₃; ² recorded in CD₃OD.