Table 1.

¹H NMR Data of Compounds 1–4 (500 MHz, CDCl₃)

No.	1	2	3	4
	(mult., J in Hz)	(mult., J in Hz)	(mult., J in Hz)	(mult., J in Hz)
1	2.05, ddd (8.3, 5.7, 4.2)	2.05, ddd (8.1, 5.7, 4.3)	2.08, ddd (8.3, 5.8, 4.2)	2.02, ddd (8.5, 6.2, 4.3)
2α	0.98, m	0.98, m	1.02, m	0.95, m
2β	0.27, m	0.29, m	0.33, m	1.26, m
3	1.83, m	1.82, m	1.87, m	1.57, m
6	3.93, d (3.7)	3.89, d (3.9)	3.93, d (3.9)
9	3.95, s	3.92, s	3.97, s	3.78, s
13	1.87, s	1.90, s	1.94, s	1.78, s
14	1.00, s	0.98, s	1.02, s	1.01, s
15	2.75, m 2.60, m	2.78, m 2.55, ddd (16.4, 6.2, 3.9)	2.81, d (16.2) 2.58, ddd (16.2, 6.2, 3.9)	3.03, dd (14.2, 7.1) 1.61, m
1′	1.60, m	1.57, dt (8.4, 3.8)	1.60, dt (8.8, 5.7)	1.84, m
2′α	0.74, m	0.68, m	0.71, m	0.60, m
2′β	1.32, m	1.23, m	1.26, m	1.18, m
3′	1.45, m	1.49, ddd (9.0, 7.3, 3.8)	1.52, m	1.25, m
5′	1.81, m	1.82, m	1.87, dd (13.7, 6.1)	1.66, dd (13.2, 6.5)
6′α	2.52, dd (18.4, 5.8)	2.28, dd (18.5, 6.1)	2.28, dd (18.4, 6.1)	2.29, dd (17.6, 6.5)
6′β	2.77, m	2.72, m	2.72, dd (18.4, 13.7)	2.89, dd (17.6, 13.2)
9′	1.83, m	1.89, m	1.94, m	2.56, dd (10.2, 7.1)
13′	4.97, d (13.4) 4.82, d (13.4)	4.37, d (13.6) 4.30, d (13.6)	4.41, d (13.6) 4.34, d (13.6)	4.44, d (13.8) 4.37, d (13.8)
14′	0.88, s	0.85, s	0.88, s	0.98, s
15′	4.30, d (11.8) 3.83, d (11.8)	4.07, d (11.5) 3.81, d (11.5)	4.83, d (11.5) 4.10, d (11.5)	4.03, d (11.4) 3.97, d (11.4)
2″	6.65, q (1.5)	5.89, s	5.73, m	5.89, d (1.4)
4″	9.67, s	4.62, s	1.94, s	4.66, m
5″	2.19, d (1.5)	2.13, s	2.19, s	2.16, s
7″		2.67, m		2.67, m
8″		2.73, m		2.73, m
12-OMe	3.68, s	3.75, s	3.65, s	3.77, s
6″-OMe	3.66, s
9″-OMe		3.67, s		3.69, s
4-OOH				8.64, s