Table 1.

Nuclear magnetic resonance (NMR) spectroscopic data of compounds 1 and 2 in CDCl₃.

Pos.	1		2
	δCa, Type	δH (J in Hz) b	δCa, Type	δH (J in Hz) b
1	176.4, C		172.4, C
2		6.10, brs		5.96, brs
3	52.9, CH	2.97, m	52.4, CH	2.99, m
4	53.9, CH	2.81, t (4.4)	52.3, CH	2.56, dd (8.5,7.1)
5	35.9, CH	2.67, brs	34.8, CH	2.80, brs
6	140.6, C		140.9, C
7	125.6, CH	5.45, brs	123.5, CH	5.29, brs
8	42.9, CH	3.61, d (12.1)	41.1, CH	3.36, d (10.3)
9	68.9, C		86.5, C
10	47.2, CH2	1.49, m; 1.25, m	46.8, CH2	1.83, m; 1.23, m
11	14.4, CH3	1.18, d (7.1)	14.3, CH3	1.19, d (7.3)
12	20.5, CH3	1.77, s	20.1, CH3	1.77, s
13	125.1, CH	5.70, d (11.4)	123.8, CH	5.94, d (10.3)
14	135.9, C		138.2, C
15	36.9, CH2	2.07, m	33.1, CH2	2.27, m; 2.14, m
16	29.3, CH	1.50, m; 1.30, m	75.1, CH	4.42, brs
17	68.6, CH	4.35, d (6.3)	32.3, CH2	2.04, m; 2.28, m
18	88.8, CH	3.86, d (11.3)	208.9, C
19	44.0, CH	2.25, m	29.0, CH2	2.32, m; 3.02, m
20	47.7, CH	3.51, dd (4.9, 11.0)	34.1, CH2	2.62, m; 2.44, m
21	214.2, C		171.9, C
22	26.0, CH	1.53, m	25.6, CH	1.59, m
23	21.2, CH3	0.93, d (6.4)	21.1, CH3	0.92, d (6.5)
24	24.2, CH3	0.96, d (6.4)	23.8, CH3	0.94, d (6.5)
25	16.1, CH3	1.57, s	17.7, CH3	1.56, s
26	109.4, CH	5.91, d (3.9)
27	73.1, CH2	4.79, m
28	158.1, C
29	127.6, C
30	51.4, CH	3.59, m
31	197.0, C
32	77.3, CH	4.42, dd (3.6, 11.1)
33	14.0, CH3	1.85, s

^a Recorded at 500 MHz in CDCl₃. ^b Recorded at 125 MHz in CDCl₃.