Table 5.

¹³C and ¹H NMR Data of Compounds 15 and 17^a

	15		17
position	δC	δH	δC	δH
1	142.5, s		146.7, s
3	137.2, d	8.37, d (5.6)	137.9, d	8.39, d (5.6)
4	113.7, d	7.83, d (5.6)	112.9, d	7.79, d (5.6)
4a	128.9, s		128.2, s
4b	123.1, s		124.1, s
5	113.5, d	7.59, d (7.7)	118.9, d	7.97, d (7.8)
6	120.9, d	7.13, dd (7.7, 7.6)	119.4, d	7.23, dd (7.8, 7.6)
7	112.2, d	7.04, d (7.6)	120.1, d	7.29, d (7.6)
8	143.3		136.6, s
8a	133.4, s		133.3, s
9a	134.1, s		134.7, s
10	137.9, s		40.8, d	4.36, brs
11	127.9, d	6.81, s	126.0, d	6.53, s
12	68.3, s		138.4, s
13	36.5, t	2.20, m	34.4, t	2.52, m 2.37, m
14	21.3, t	2.15, m	28.1, t	2.42, 2H m
15	130.1, d	5.46, m	130.5, d	5.47, m
16	132.3, d	5.39, m	131.4, d	5.35, m
17	24.9, t	1.57, m	24.7, t	1.37, 2H m
18	26.5, t	1.66, m	27.8, t	2.70, m 2.42, m
19	25.4, t	1.60, m	27.3, t	1.95, 2H m
20	52.7, t	2.88, m 2.41, m	59.4, t	2.39, m 2.30, m
22	49.6, t	2.87, m 2.59, m	51.2, t	2.89, 2H m
23	32.6, t	2.44, m 2.15, m	23.6, t	1.68, 2H m
24	40.1, d	3.16, m	37.9, d
25	45.5, s		52.9, s
26	81.5, d	3.88, s	63.3, d	4.83, s
28	41.1, t	3.15, m 2.99, m	45.8, t	3.77, 2H m
29	25.3, t	1.60, m	29.7, t	1.81, 2H m
30	29.1, t	2.12, m 1.65, m	30.4, t	1.89, 2H m
31	64.0, d	3.77, brs	71.7, d	4.91, ddd (11.9, 8.2, 3.6)
32	31.1, t	2.15, m 1.55, m	36.9, t	3.04, dd (14.1, 8.2) 2.41, m
33	29.4, t	1.75, m	116.9, s
34	64.0, d	4.24, brs	163.9, s
35	36.5, t	2.30, m 2.15, m	111.7, s
36	68.9, t	2.68, d (11.9) 2.35, d (11.9)	62.1, t	2.62, d (11.9) 2.51,d (11.9)
37			148.1, s
38			16.8, q	1.85, s
OAc-8			169.8, s 21.7, q	2.58, s
OAc-31			170.3, s 20.7, q	2.07, s
Ac-35			192.0, s 27.3, q	2.29, s
OAc-37			168.8, s 21.2, q	2.21, s

^aIn CDCl₃, 400 or 500 MHz for ¹H and 100 or 125 MHz for ¹³C NMR. Carbon multiplicities were determined by DEPT 135° experiments.

s = quaternary, d = methine, t = methylene, q = methyl carbons. Coupling constants (J) are in Hz.