Table 1.

¹³C-NMR (150 MHz), ¹H-NMR (600 MHz) data, HMBC and H, H-COSY correlations of Compound 4 (CDCl₃).

No.	13C	1H	HMBC	H, H-COSY
1	35.3 t	1.72, m	175.1, 55.7, 49.7, 40.0, 31.2, 14.4	2.64
		1.47, m	175.1, 49.7, 40.0, 31.2, 14.4	2.64
2	31.2 t	2.64, m	175.1, 40.0, 35.5	1.72, 1.47
3	175.1 s
4	86.0 s
5	55.7 d	1.63, dd, (3.9, 10.4)	86.0, 49.7, 40.0, 38.3, 35.3, 32.7, 24.6, 22.1, 14.4
6	22.1 t	1.49, m	55.7, 40.0, 38.3, 33.2
7	38.3 t	1.39, m	56.6, 49.7, 33.2, 26.3, 22.1
		1.20, m	56.6, 49.7, 33.2, 26.3, 22.1
8	33.2 s
9	49.7 d	1.35, ddd, (1.5, 7.0, 11.4)	56.6, 40.0, 35.3, 33.2, 26.3, 23.3, 14.4	2.09
10	40.0 s
11	23.3 t	2.09, m	71.3, 49.7, 40.0, 37.5, 33.2, 23.2	1.35
		1.18, m	71.3, 37.5
12	37.5 d	1.58, m	71.3, 56.6, 49.7, 30.0, 26.3, 23.3
13	23.2 t	1.69, m	71.3, 37.5, 33.2, 26.3, 23.3	1.84, 0.87
		1.48, m	71.3, 37.5, 33.2, 26.3, 23.3	1.84, 0.87
14	26.3 t	1.84, m	56.6, 37.5, 33.2, 23.2	1.69, 1.48
		0.87, m	56.6, 49.7, 33.2, 23.2	1.69, 1.48
15	56.6 t	1.35, m	71.3, 49.7. 38.3, 33.2, 30.0, 26.3
		1.24, m	71.3, 49.7. 38.3, 33.2, 30.0, 26.3
16	71.3 s
17	30.0 q	1.31, s	71.3, 56.6, 37.5
18	32.7 q	1.46, s	86.0, 55.7, 24.6
19	24.6 q	1.45, s	86.0, 55.7, 32.7
20	14.4 q	1.17, s	55.7, 49.7, 40.0, 35.3