Table 1. NMR Data of Compound 1a and 1b in CD₃CN-d₃.

	1a		1b
no.	δC	δH (J in Hz)	δC	δH (J in Hz)
1	NDa		ND
2	108.2 C		108.0 C
3	161.1 C		ND
4	120.7 C		121.1 C
5	150.1 C		ND
6	120.9 CH	7.42 brs	ND	7.28 brs
7	139.2 C
8	57.7 CH	4.37 s	57.5 CH	4.46 s
9	145.4 C		ND
10	109.7 CH	6.00 brs	109.2 CH	6.35 brs
11	164.2 CH		ND
12	102.7 CH	6.22 s	102.6 CH	6.15 s
13	165.2 C		165.3 C
14	111.3 C		112.4 C
15	192.0 C		ND
16	116.4 C		115.1 C
17	158.1 C		158.6 C
18	125.1 C		125.2 C
19	20.2 CH2	2.76 m; 2.33 m	20.4 CH2	2.83 m; 2.50 m
20	31.2 CH2	2.74 m	30.7 CH2	2.73 m
21	ND		ND
22	120.4 CH	6.75 s	120.2 CH	6.74 s
23	140.1 C		ND
24	ND	3.27 brs	ND	3.23 brs
25	ND		ND
26	28.5 CH3	1.76 s	28.2 CH3	1.75 s
17-OH		11.87 s		12.10 s
13-OH		11.94 s		11.80 brs
1-COOH		12.16 brs		12.3 brs

^aND: not detected.