Table 3.

¹H NMR data of 10 − 12, 14 − 15 (400 MHz, J in Hz)

No	10a	11a	12a	14b	15b
5	6.21, s			5.96, d (1.7)	5.99, d (2.0)
7		6.41, s		6.16, d (1.7)	6.28, d (2.0)
2'				3.90, dd (11.8, 4.8)
3'	5.62, s	5.62, s	5.64, s	2.30, m	6.08, dd (10.1, 2.1)
				1.86, m
4’				1.83, m	7.14, ddd (10.1, 5.8, 2.2)
				1.39, m
5'	2.90, dd (15.4, 13.2)	2.89, dd (16.4, 13.4)	2.90, dd (15.4, 13.2)	2.00, m	3.03, ddt (19.2, 11.0, 2.6)
	2.42, dd (15.4, 3.5)	2.42, dd (16.4, 4.4)	2.43, dd (15.5, 3.2)	1.50, m	2.47, dt (19.3, 5.7)
6'	2.83, m	2.78, m	2.85, m	1.92, m	2.75, m
4-OCH3	3.87, s	4.05, s	4.02, s	3.86, s	3.85, s
6-OCH3				3.85, s	3.87, s
2'-OCH3	3.70, s	3.70, s	3.71, s
6'-CH3	0.91, d (6.4)	0.93, d (6.5)	0.93, d (6.2)	0.81, d (6.4)	1.01, d (6.7)

^aData were recorded in CD₃OD.

^bData were recorded in CDCl₃.