Table 1.

¹H NMR data of 1–6 (DMSO-d₆, δ ppm, J in Hz).

H	1	2	3	4	5	6
1	3.47, t (4.2)	6.30, d (12.6)	6.31, d (12.2)	1.32, m; 2.43, m	1.33, m; 2.43, m	3.50, t (4.5)
2	2.50, dd (4.2, 4.9)	5.76, d (12.6)	5.76, d (12.2)	1.72, m; 2.42, m	1.73, ddd (4.0, 12.5, 15.0) 2.42, m	2.54, ddd (4.5, 5.0, 10.1)
5	1.24, dd (1.7, 11.7)	2.02, br d (12.1)	1.94, dd (2.7, 12.7)	1.29, m	1.29, dd (2.0, 12.0)	1.67, dd (2.0, 12.0)
6	1.43, dt (3.2, 13.0) 1.61, br ddd (1.7, 2.0, 13.0)	1.65, m 1.68, m	1.62, ddd (2.7, 3.0, 13.0) 1.75, ddt (3.0, 12.7, 13.0)	1.49, m; 1.51, m	1.48, m; 1.50, m	1.51, m 1.62, m
7	1.85, dt (3.2, 12.0) 2.07, ddd (2.0, 3.2, 12.0)	1.70, m 2.23, ddd (3.0, 12.0, 12.5)	1.63, dt (3.0, 13.0) 2.30, dt (3.0, 13.0)	1.53, m 2.23, dt (3.0, 12.5)	1.54, m 2.15, dt (4.0, 12.3)	1.63, m 2.16, dt (4.1, 12.7)
9	1.50, dd (3.6, 12.9)	1.99, dd (2.0, 12.5)	2.10, br dd (4.1, 13.7)	2.07, br dd (5.8, 12.1)	1.92, dd (8.9, 13.0)	2.59, dd (3.8, 13.7)
11	1.68, t (12.9) 1.74, dd (3.6, 12.9)	1.84, dd (12.5, 13.0) 1.87, dd (2.0, 13.0)	1.84, t (13.7) 1.89, dd (4.1, 13.7)	1.60, dd (5.8, 13.0) 1.63, dd (12.1, 13.0)	1.48, dd (8.9, 12.0) 1.57, dd (12.0, 13.0)	1.56, dd (11.7, 13.7) 1.93, dd (3.8, 11.7)
12	1.17, s	1.18, s	1.20, s	1.12, s	1.11, s	1.14, s
13	0.76, s	1.08, s	1.08, s	0.87, s	0.88, s	0.78, s
14	1.29, s	1.35, s	1.35, s	1.10, s	1.10, s	1.30, s
15	1.81, br dd (4.9, 11.2) 2.24, d (11.2)	1.30, s	1.31, s	1.13, s	1.13, s	1.87, dd (5.0, 11.1) 2.29, brd (11.1)
5′		4.30, q (6.4)	4.46, q (7.2)	4.42, q (7.2)	4.29, q (6.4)	4.21, q (6.4, 6.4, 6.4)
7′	4.67, s; 5.21, s	4.86, s; 5.09, s	4.93, s; 5.14, s	4.89, s; 5.08, s	4.82, s; 5.04, s	4.81, s; 5.03, s
8′	1.34, s	1.20, s	1.16, s	1.12, s	1.16, s	1.16, s
9′	1.33, s	1.14, d (6.4)	1.03, d (7.2)	1.03, d (7.2)	1.15, d (6.4)	1.15, d (6.4)
OMe	3.57, s			3.57, s	3.57, s
OH-1	5.16, d (4.2)					5.16, d (4.5)
OH-4′				4.09, s
OH-5′	6.28, s				6.76, s
OH-6′		6.95, s	7.09, s	7.04, s		6.68, s