Table 10.

¹H and ¹³C NMR spectral data for compounds 18, 19, and 20

Position	18		19		20
	δH	δC	δH	δC	δH	δC
2	6.9, d(6.8)	130.0, d	7.4, d(7.2)	130.0, d	7.8, d(6.4)	131.7, d
3	6.7, d(6.8)	101.2, d	7.1, d(7.2)	113.3, d	6.8, d(6.4)	113.6, d
3a		148.5, s		148.8, s		150.5, s
5	7.6, d(7.2)	147.6, d	7.5, d(6.8)	147.2, d	7.7, d(7.6)	144.7, d
6	7.3, br d	113.3, d	6.8, br d	129.6, d	7.0, d(7.6)	129.9, d
6a		135.6, s		136.0, s		135.0, s
7	6.8, s	99.6, d	6.8, s	100.6, d	6.7, s	99.1, d
8		152.6, s		156.7, s		156.1, s
9		134.8, s		123.7, s		132.1, s
9a		124.8, s		134.3, s		122.8, s
9b		117.4, s		117.5, s		117.6, s
NCH3	3.9. s	45.5, q	4.0, s	45.2, q	3.7, s	44.8, q
OCH3	3.9, s	57.0, q	3.9, s	56.7, q	3.9, s	56.6, q
1′		158.0, s		172.0, s		163.7, s
2′	3.5, br t	46.9, t	2.6, t(7.2)	33.9, t		137.2, s
3′	2.0, br m	24.9, t	1.8, br m	24.6, t	8.3, d(8)	131.0, d
4′	2.0, br m	25.8, t	1.3, br m	29.0, t	7.9, d(8)	132.8, d
5′	3.5, br t	46.8, t	1.3, br m	29.2, t		118.7, s
6′			1.3, br m	29.7, t	7.9, d(8)	132.8, d
7′			1.3, br m	29.2, t	8.3, d(8)	131.0, d
8′			2.0, br q	27.1, t		117.7, s
9′			5.4, br q	129.7, d
10′			5.4, br q	129.8, d
11′			2.0, br q	27.1, t
12′			1.3, br m	29.2, t
13′			1.3, br m	29.4, t
14′			1.3, br m	29.6, t
15′			1.3, br m	29.1, t
16′			1.3, br m	31.8, t
17′			1.3, br m	22.6, t
18′			0.9, br t	14.1, q

Measured in CDCl₃ at 400 MHz for ¹H and 100 MHz for ¹³C, respectively. J values in Hz.