Table 1.

¹H and ¹³C NMR data for compound 1 recorded in CDCl₃ at 700 MHz

Position	δC	type	δH, multiplicity (J = Hz)
1	171.0	C
3	83.1	CH	4.48, brt (7.0)
4	66.9	CH	4.73, brs
4a	135.0	C
5	117.3	CH	7.20, s
5a	140.1	C
6	99.1	CH	6.79, s
7	161.7	C
8	109.4	C
9	155.6	C
9a	109.2	C
10	163.1	C
10a	97.8	C
11	28.0	CH2	1.98, m
12a	32.0	CH2	1.29, m
12b			1.65, m
13	34.5	CH	1.42, m
14	29.5	CH2	1.22, m
			1.44, m
15	11.5	CH3	0.91, t (7.3)
16	19.2	CH3	0.94, d (6.5)
17	56.2	CH3	3.86, s
4-OH			1.86, brs
9-OH			9.67, s
10-OH			13.79, s