Table 2.

¹H and ¹³C NMR Data of Compounds 4 and 5.

Position	4 a		5 a
	δC	δH, Mult. (J in Hz)	δC	δH, Mult. (J in Hz)
1	169.9, C		170.1, C
2		7.01, brs		8.26, brs
3a	45.3, CH2	4.70, d (15.6)	66.2, CH	5.31, d (3.1)
3b		4.49, d (15.6)
4	148.0, C		146.8, C
6	147.1, C		146.4, C
7	127.1, CH	7.63, d (8.0)	127.8, CH	7.64, d (7.9)
8	135.1, CH	7.78, t (8.0)	135.3, CH	7.72, t (7.9)
9	127.6, CH	7.50, t (8.0)	127.0, CH	7.45, t (7.9)
10	127.3, CH	8.30, d (8.0)	125.6, CH	8.18, d (7.9)
11	120.5, C		120.5, C
12	160.4, C		159.8, C
14	51.5, CH	5.81, dd (8.6, 3.8)	54.1, CH	5.62, dd (4.7, 2.3)
15a	39.7, CH2	2.37, dd (14.5, 8.9)	37.2, CH2	2.49, dd (15.3, 2.1)
15b		2.74, dd (14.5, 3.9)		3.28, dd (15.3, 5.1)
16	74.2, C		74.8, C
17	79.8, CH	5.25, s	80.9, CH	4.58, d (1.3)
19	59.0, CH	4.25, q (12.8, 6.2)	64.3, CH	4.21, q (11.9, 6.5)
20	172.9, C		165.8, C
22	137.4, C		136.1, C
23	115.8, CH	7.52, d (7.4)	115.2, CH	7.39, d (7.6)
24	125.3, CH	7.08, t (7.4)	128.1, CH	7.24, t (7.6)
25	130.3, CH	7.30, t (7.4)	130.5, CH	7.08, t (7.6)
26	124.2, CH	7.31, d (7.4)	124.4, CH	7.34, d (7.6)
27	138.0, C		138.1, C
28	18.2, CH3	1.39, d (6.6)	14.9, CH3	1.51, d (6.5)
16-OH		5.00, brs		4.64, brs

^a Measured in CDCl₃ (¹H 600 MHz, ¹³C 150 MHz, TMS, δ ppm).