Table 1. ¹H NMR Data (800 MHz) of Compounds 1–4 in CDCl₃.

	δH, mult (J in Hz)
atom#	1	2	3	4
1β	2.25, dd (12.2, 4.1)	2.22, dd (12.3, 4.3)	2.12, dd (12.1, 4.2)	2.15, dd (12.2, 4.4)
1α	1.57, t (12.2)	1.54, t (12.3)	1.37, m	1.40, m
2	5.22, td (10.8, 4.1)	5.20, td (10.8, 4.3)	5.17, td (10.8, 4.2)	5.18, td (10.8, 4.4)
3	4.85, d (10.8)	4.83, d (10.8)	4.79, d (10.8)	4.81, d (10.8)
5	1.88, dd (13.3, 4.0)	1.85, dd (13.3, 4.0)	1.26, m	1.30, m
6β	2.46, m (2H)	2.44, m (2H)	1.55, m	1.57, m
6α			1.70, m	1.72, m
7			2.06, m	2.06, m
11β	2.31, m (2H)	2.30, m (2H)	1.78, m	1.79, m
11α			2.49, m	2.52, m
12	1.81, m	1.79, m	4.13, t (7.7)	4.14, t (7.7)
15β	1.75, m	1.74, m	1.70, m	1.73, m
15α	2.10, m	2.07, m	1.21, m	1.25, m
16β	1.41, m	1.40, m	1.56, m	1.58, m
16α	2.01, m	2.01, m	1.89, m	1.91, m
17	1.47, m	1.44, m	1.87, m	1.89, m
18	0.67, s	0.65, s	0.72, s	0.74, s
19	1.32, s	1.30, m	1.14, s	1.16, s
20	1.43, m	1.40, m	1.66, m	1.67, m
21	0.93, d (6.6)	0.92, d (6.6)	1.01, d (6.6)	1.04, d (6.6)
22	1.85, m	1.83, m	1.28, m	1.31, m
22	1.33, m	1.31, m	1.92, m	1.95, m
23	2.59, m	2.57, ddd (17.1, 9.8, 5.1)	2.56, m	2.60, dd (9.5, 5.4)
23	2.51, m	2.49, ddd (17.1, 9.3, 6.1)
26	1.41, s	1.38, s	1.39, s	1.41, s
27	1.41, s	1.39, s	1.38, s	1.40, s
28	0.94, s	0.92, m	0.90, s	0.93, s
29	1.03, s	1.00, s	0.94, s	0.95, s
30	0.93, s	0.91, m	0.91, s	0.93, m
2′	2.57, m	2.54, AB (15.4)	2.53, m	2.56, AB (15.6)
2′	2.70, m	2.68, AB (15.4)	2.68, m	2.70, AB (15.6)
4′	1.40, s	1.35, s	1.38, s	1.36, s
5′a	2.55, br m	2.62, AB (15.4)	2.64, m	2.73, AB (14.9)
5′b	2.72, br m	2.71, AB (15.4)	2.68, m	2.64, AB (14.9)
7′		3.71, s		3.73, s
3-OAc	2.09, s	2.07, s	2.06, m	2.08, s
25-OH		3.82, s		3.83, s
3′-OH		3.91, s		3.96, s