Table 1.

¹H (125 MHz) and ¹³C NMR (500 MHz) data of compounds 1–3 (recorded in DMSO (dimethyl sulfoxide)-d₆, δ in ppm).

Pos.	1		2		3
	1H (J in Hz)	13C	1H (J in Hz)	13C	1H (J in Hz)	13C
1		173.5, C		173.6, C		173.6, C
2	2.52, overlap	41.0, CH	2.40, dt (13.2, 6.7)	35.5, CH	2.40, m	35.5, CH
3	3.95, m	65.8, CH	α 1.90, m, β 1.56, overlap	27.9, CH2	α 1.90, ddd (8.5, 6.2, 2.9) β 1.53, m	27.7, CH2
4	α 1.73, m, β 1.82, m	23.9, CH2	α 1.78, d (10.7) β 1.57, overlap	27.6, CH2	α 1.78, m β 1.51, m	24.5, CH2
5	4.44, m	79.2, CH	4.16, m	84.4, CH	4.17, m	84.5, CH
6	1.68, m,	36.7, CH	1.64, m	37.0, CH	1.64, m	37.2, CH
7	1.14, m	31.3, CH2	1.08, m	31.3, CH2	1.05, m	31.8, CH2
8	1.26, m	32.0, CH2	1.27, m	24.6, CH2	1.40, m	24.3, CH2
9	α 1.14, m, β 1.55, m	32.4, CH2	α 1.23, m, β 1.55, overlap	32.4, CH2	α 1.03, m β 0.96, m	32.4, CH2
10	2.52, overlap	46.0, CH	2.50, overlap	46.0, CH	1.31, m	40.0, CH
11		211.8, C		211.8, C	3.48, dt (10.7, 5.4)	68.8, CH
12	2.09, s	27.9, CH3	2.09, s	23.9, CH3	0.97, d (6.3)	20.3, CH3
13	1.10, d (7.1)	12.8, CH3	1.14, d (7.0)	17.0, CH3	1.13, d (7.0)	17.1, CH3
14	0.84, d (6.9)	14.4, CH3	0.84, d (6.8)	14.4, CH3	0.85, d (6.8)	14.5, CH3
15	0.98, d (6.8)	15.9, CH3	0.99, d (6.9)	15.9, CH3	0.79, d (6.7)	14.5, CH3
3-OH	5.20, br s
11-OH					4.21, d (4.7)