Table 4.

Selected ¹H-NMR Data of compounds 7–12.

H	7	8	9	10	11	12
13	2.12 m	2.12 m	2.10 m	2.10 m	2.12 m	2.11 m
14 α	2.72 dd	2.72 dd	2.72 dd	2.70 dd	2.74 dd	2.72 dd
14 β	2.50 dd	2.50 dd	2.53 m	2.53 m	2.46 dd	2.45 dd
16	1.15 d (6.6)	1.15 d (6.5)	1.12 d (6.6)	1.12 d (6.6)	1.15 d (6.6)	1.14 d (6.6)
17	1.54 s	1.62 s	1.59 s	1.59 s	0.95 d (7.5)	0.93 d (7.5)
18	1.28 s	1.22 s	1.25 s	1.19 s	1.27 s	1.19 s
20	0.91 s	0.80 s	0.88 s	0.77 s	0.83 s	0.70 s
OMe	-	3.65 s	-	3.62 s	-	3.66 s
Quinone
5 and 8	8.11 m	8.11 m	8.09 m	8.09 m	8.10 m	8.10 m
6 and 7	7.75 m	7.75 m	7.72 m	7.72 m	7.74 m	7.74 m
1’	3.29 br d	3.28 br d	2.46 m	2.46 m	3.28 br d	3.28 br d
2’	5.09 br t	5.09 br t	1.35 m	1.36 m	5.08 br t	5.09 br t
3’	-	-	1.58 m	1.58 m	-	-
4’	1.78 s	1.78 br s	0.93 d (6.6)	0.93 d (6.6)	1.78 br s	1.78 br s
5’	1.70 s	1.70 br s	0.93 d (6.6)	0.93 d (6.6)	1.70 br s	1.69 br s

J (Hz): 14α, 14β = 15.3; 13, 14α = 5.5; 13, 14β = 8.1.