Table 2.

Selected ¹H NMR data (δ ppm, J in parenthese in Hz) for compounds 4 and 7–9.

Pos	4	7	8	9
7		5.43, bs	5.31 (d, J = 4.3)	5.22, s
14	5.91 (dd, J = 10.75, 17.35)	5.78
15	5.04 (d, J = 10.75) 5.20 (d, J = 17.35)		5.81 (dd, J = 10.5, 17.5)	5.77 (dd, J = 10.2, 17.0)
16	1.26 s	0.99 J = 5.0	4.86 d J = 10.5 4.92 d J = 17.5	4.84 (d, J = 10.2) 4.90 (d, J = 17.0)
17	4.48, s 4.80, s	1.02 (d, J = 5.0)	0.86, s	0.83, s
18	0.87, s	1.25, s	1.26, s	1.19, s
19	0.80, s
20	0.67, s	0.71, s	0.90, s	1.04, s