Table 1.

¹H NMR Data for Compounds 1−6 (CDCl₃, 600 MHz)^a

no.	1	2	3	4	5	6
1		3.24, d (4.8)	2.28, d (15.6)
2		1.80, dd (12.0, 4.8)	1.99, d (15.6)
3	7.31, dd (7.2, 1.2)		2.22, m
4	6.85, t (7.2)	2.10, m 1.93, m	1.78, m 1.43, m
5	7.24, td (7.8, 1.2)	1.99, m 1.37, m	1.78, m 1.59, m	2.71, t (7.2)		2.34, t (6.6)
6	6.69, d (7.8)	2.56, m	4.83, br s	4.05, dd (10.8, 7.8)	6.05, s 5.53, s	1.81, m 1.39, m
				3.88, br t (8.4)
7				1.72, m 1.70, m	1.87, m 1.82, m	1.62, m 1.51, m
8	2.61, m	4.88, s	5.65, s	0.87, m	0.96, m 0.87, m	1.39, m
9	3.73, m 2.88, dd (18.6, 9.6)			1.24, m	1.22, m	0.94, t (7.2)
10	4.75, s	7.11, s	2.21, d (15.0) 2.01, d (15.0)	1.24, m	1.23, m	2.05, m 1.93, m
11	4.53, q (6.6)			0.85, t (6.6)	0.83, t (6.6)	2.04, m
12			1.04, s	1.73, s	1.81, s
13	7.13, s	1.96, s	1.03, s	1.99, s	2.00, s	1.70, s
14	1.41, d (6.6)	1.68, s	1.73, s			1.98, s
15		1.33, s	0.99, d (7.2)
3′		7.29, s
6′		6.54, s
7′		2.15, s
OEt	4.13, q (7.2)					4.11, q (6.6)
	1.25, t (7.2)					1.24, t (6.6)

^aThe coupling constants (J) are in parentheses and reported in Hz; chemical shifts are given in ppm.