Table 1. NMR Spectroscopic Data (500 MHz, CDCl₃) of Compounds 1 and 2^a.

position	1		2
	δC, mult.	δH (J in Hz)	δC, mult.	δH (J in Hz)
1	40.4, CH2	1.64, m (H-1α)	39.0, CH2	1.40, m (H-1α)
		2.20, m (H-1β)		1.93, dt (13.6, 3.4) (H-1β)
2	35.1, CH2	2.23, m (H-2α)	24.6, CH2	1.66, m
		2.76, td (14.6, 5.6) (H-2β)
3	216.6, qC		80.9, CH	4.48, dd (9.0, 6.7)
4	48.0, qC		38.1, qC
5	46.4, CH	1.72, m	44.5, CH	1.38, m
6	19.2, CH2	1.40 (H-6α), 1.75 (H-6β), m	18.8, CH2	1.61, 1.76, m
7	17.8, CH2	1.41, 1.70, m	17.8, CH2	1.27, 1.63, m
8	38.8, CH	2.09, bd (13.6)	39.0, CH	2.02, bd
9	148.9, qC		150.1, qC
10	37.6, qC		37.6, qC
11	117.1, CH	5.39, m	116.4, CH	5.32, m
12	35.0, CH2	2.51, ddd (17.9, 5.6, 1.5) (H-12α), 1.68, m (H-12β)	35.1, CH2	2.49, ddd (17.8, 5.4, 1.8) (H-12α), 1.66, m (H-12β)
13	36.3, qC		36.3, qC
14	37.3, qC		37.3, qC
15	28.9, CH2	1.40, m	28.9, CH2	1.36, m
16	35.8, CH2	1.65, m (H-16β), 1.82, dt (13.2, 3.4) (H-16α)	35.8, CH2	1.64, m (H-16β), 1.83, dt (13.2, 3.3) (H-16α)
17	43.0, qC		43.1, qC
18	64.6, CH	2.18, s	64.7, CH	2.17, s
19	215.4, qC		215.5, qC
20	42.4, CH2	1.77, dd (18.9, 10.3) (H-20α), 2.38, dd (18.9, 8.2) (H-20β)	42.4, CH2	1.77, dd (18.9, 10.0) (H-20α), 2.38, dd (18.9, 8.0) (H-20β)
21	55.2, CH	1.45, m	55.2, CH	1.44, m
22	30.2, CH	1.64, m	30.2, CH	1.63, m
23	24.3, CH3	1.04, s	27.4, CH3	0.84, s
24	21.7, CH3	1.12, s	16.1, CH3	0.94, s
25	24.2, CH3	1.30, s	25.2, CH3	1.08, s
26	15.6, CH3	0.77, s	15.6, CH3	0.73, s
27	17.0, CH3	0.97, s	16.9, CH3	0.98, s
28	15.8, CH3	0.91, s	15.8, CH3	0.91, s
29	22.2, CH3	0.99, d (6.6)	22.3, CH3	0.98, d (6.5)
30	22.8, CH3	0.88, d (6.6)	22.8, CH3	0.88, d (6.5)
CH3COO			170.9, qC
CH3COO			21.3, CH3	2.05, s

^aAssigned by a combination of ¹H–¹H COSY, NOESY, HSQC, and HMBC experiments.