Table 1.

¹H- and ¹³C-NMR data (500 and 125 MHz) for compounds 3 and 4 ^{a, b}.

Position	3			4
	δC, Type b		δH (J in Hz)	δC, Type b		δH (J in Hz)
1	39.9	CH2	0.62, br dd (14.0, 14.0)	39.9	CH2	0.63, ddd (14.5, 14.5, 4.5)
			1.58, m			1.58, m
2	18.7	CH2	1.38, m	18.3	CH2	1.39, m
			1.61, m			1.56, m
3	42.1	CH2	1.13, m	42.2	CH2	1.12, ddd (13.0, 13.0, 4.0)
			1.36, m			1.35, m
4	33.5	C		33.5	C
5	56.8	CH	0.83, m	56.7	CH	0.83, m
6	18.2	CH2	1.31, m	18.7	CH2	1.40, m
			1.57, m			1.58, m
7	41.2	CH2	1.06, br dd (13.5,10.5)	41.4	CH2	1.04, ddd (11.5,11.5,3.5)
			1.78, m			1.77, m
8	37.7	C		38.0	C
9	53.1	CH	1.31, m	52.7	CH	1.38, m
10	37.2	C		37.2	C
11	21.9	CH2	1.81, m	22.6	CH2	1.63, m
			1.92, m			1.81, m
12	73.0	CH	5.48, br s	74.8	CH	5.45, br s
13	41.7	C		39.5	C
14	50.9	CH	2.34, br d (13.5)	51.6	CH	2.19, dd (10.0, 7.3)
15	34.9	CH2	2.47, dd (17.5,13.5)	35.4	CH2	2.48, br d (7.3)
			2.57, br d (17.5)			2.49, br d (10.0)
16	194.6	C		196.8	C
17	120.2	C		121.1	C
18	172.7	C		135.5	C
19	142.9	CH	7.26, br s	119.5	CH	7.30, br s
20	106.5	CH	6.59, br s	111.2	CH	6.32, br s
21	33.5	CH3	0.85, s	33.5	CH3	0.84, s
22	21.5	CH3	0.81, s	21.6	CH3	0.81, s
23	16.3	CH3	0.85, s	16.4	CH3	0.84, s
24	17.0	CH3	0.99, s	17.1	CH3	0.98, s
25	20.4	CH3	1.32, s	25.2	CH3	1.27, s
12-OAc	172.7	C		171.2	C
	21.4	CH3	1.88, s	21.5	CH3	1.91, s

^a Data were obtained in CDCl₃. ^b The assignments are based on HSQC, COSY, and HMBC results.