Table 1.

¹H (500 MHz) and ¹³C (125 MHz) NMR data of 1 in CDCl₃

No.	δ C	δH (mult., J in Hz)	No.	δ C	δH (mult., J in Hz)
1	109.2		1′	87.7
2	188.7		2′	39.5	2.04 ddd (9.8, 7.7, 1.2)
3	117.2		3′a	36.5	1.77 dd (12.5, 7.7)
4	171.7		3′b		1.26 dd (12.5, 9.8)
5	42.6		4′	33.2
6	168.5		5′a	14.3	0.51 dd (8.4, 5.1)
7	37.2	2.45 brdd (9.5, 1.2)	5′b		0.34 dd (5.1, 3.5)
8	31.9	1.66 m	6′	36.0	1.31 m
9	21.8	0.99 d (6.6)	7′	24.8	1.48 s
10	21.5	0.76 d (6.6)	8′	31.8	1.32 hept (6.8)
11	10.1	1.90 s	9′	19.5	0.74 d (6.8)
12	24.1	1.34 s	10′	20.0	0.81 d (6.8)
13	23.6	1.31 s	OMe-4	61.7	3.85 s