Table 1.

¹H and ¹³C NMR data for compounds 1–3 obtained at 500/125 MHz, respectively, in CDCl₃.

Position	1		2		3
	δC, type	δH, mult., ( J)	δC, type	δH, mult., ( J)	δC, type	δH, mult., ( J)
1	186.7, C		83.6, C		60.5, CH	2.54, dd (12.0, 8.0)
2	79.0, CH	5.57, ddd (7.0, 3.0, 1.0)	63.2, C		54.5, C
3	62.2, C		147.5, C		55.5, CH	2.56, dd (7.0, 1.0)
4	206.5, C		195.3, C		216.5, C
5	31.3, CH2	α: 2.72, dd (18.0, 10.0);	128.4, CH	6.39, s	49.8, CH2	α: 2.19, d (19.0);
		β: 2.28, dd (18.0, 7.5)				β: 2.66, dd (19.0, 1.0)
6	52.2, CH	3.43, ddd (10.0, 7.5, 7.0)	184.3, C		87.0, C
7	174.7, C		126.5, CH	7.18, s	56.8, CH2	α: 2.38, d (15.0);
						β: 2.19, d (15.0)
8	142.5, C		157.3, C		90.9, C
9	206.0, C		207.3, C		58.8, CH2	α: 1.94, d (14.0);
						β: 1.77, dd (14.0, 3.0)
10	51.0, C		51.1, C		40.1, C
11	40.5, CH2	α: 2.38, dd (19.0, 3.0);	42.5, CH2	2.24, d (14.0);	44.7, CH2	α: 1.69, dd (12.0, 12.0);
		β: 2.75, dd (19.0, 1.0)		2.04, d (14.0)		β: 1.58, ddd (12.0, 8.0, 3.0)
12	23.5, CH3	1.49, s	26.4, CH3	1.27, s	11.3, CH3	0.83, s
13	27.6, CH3	2.21, s	116.6, CH2	6.18, s;	8.2, CH3	1.02, d (7.0)
				5.39, s
14	25.0, CH3	1.16, s	27.3, CH3	1.40, s	26.8, CH3	1.13, s
15	25.3, CH3	1.24, s	25.9, CH3	1.21, s	29.6, CH3	1.07, s
1α-OH				2.05, brs
6β-OH						1.54, s
8α-OH						1.74, s