Table 1.

¹H NMR spectroscopic data (400 MHz) for 1–4 in CDCl₃.

#	1	2	3	4
	δH (mult., J)	δH (mult., J)	δH (mult., J)	δH (mult., J)
1		3.70 (br s)
2α	3.35 (dd, 13.5, 3.2)	2.19 (dt, 13.5, 2.5)	3.48 (d, 3.3)	5.76 (d, 10.3)
2β	2.22 (dd, 13.5, 3.7)	1.96 (dt, 13.5, 2.7)
3	3.88 (br s)	3.52 (br s)	3.27 (d, 3.3)	6.17 (d, 10.3)
5	1.81 (dd, 12.7, 2.0)	1.78 (dd, 12.6, 2.0)
6α	1.69 (m)	1.74 (m)	1.75 (dt, 13.9, 3.5)	1.79 (dd, 14.4, 3.6)
6β	1.50 (m)	1.41 (m)	1.60 (m)	1.73 (ddd, 14.4, 4.1, 3.3)
7α	2.04 (m)	2.06 (m)	2.21 (m)	2.19 (dt, 4.9, 14.1)
7β	1.66 (m)	1.70 (m)	1.70 (dt, 12.8, 3.4)	1.82 (m)
9	2.04 (m)	2.21 (dd, 13.0, 4.9)	2.64 (dd, 12.8, 4.5)	2.60 (dd, 12.8, 4.5)
11α	2.96 (dd, 15.5, 4.5)	2.37 (dd, 15.2, 4.9)	3.04 (dd, 15.3, 4.5)	3.15 (dd, 15.5, 4.5)
11β	1.91 (dd, 15.5, 12.7)	1.99 (dd, 15.2, 13.0)	1.98 (dd, 15.3, 12.8)	2.01 (dd, 15.5, 12.8)
12	1.26 (s)	1.25 (s)	1.25 (s)	1.33 (s)
13	1.02 (s)	1.01 (s)	1.29 (s)	1.25 (s)
14	1.08 (s)	0.83 (s)	1.27 (s)	1.13 (s)
15	1.24 (s)	0.83 (s)	1.23 (s)	1.297 (s)
4′α	2.48 (dd, 16.9, 14.0)	2.49 (dd, 16.8, 14.0)	2.48 (dd, 16.9, 14.4)	2.49 (dd, 16.9, 14.0)
4′β	2.35 (dd, 16.9, 3.2)	2.32 (dd, 16.8, 3.1)	2.36 (dd, 16.9, 2.9)	2.36 (dd, 16.9, 3.2)
5′	4.57 (dqd, 14.0, 6.3, 3.2)	4.54 (ddq, 14.0, 3.1, 6.3)	4.60 (ddq, 14.4, 2.9, 6.3)	4.60 (ddq, 14.0, 3.2, 6.3)
6′	1.43 (d, 6.3)	1.42 (d, 6.3)	1.43 (d, 6.3)	1.44 (d, 6.3)
3-OH	1.54 (br s)
5-OH			2.68 (br d, 2.0)	1.44 (s)