Table 1 ¹H NMR (400 Hz) data of compounds 1–4 in CDCl₃ (δ in ppm, J in Hz).

1

—

—

—

1.66, m

2

α 1.82, m; β 1.59, m

β 1.96, dd (12.8, 7.9); α 1.77, t (12.0)

5.50, d (4.7)

0.92, m

3

β 1.77, m; α 1.60, m

2.28, t (9.3)

a 2.45, d (14.5); b 1.54, dd (14.5, 4.0)

β 1.60, m; α 0.90, m

5

1.13, d (2.9)

1.19, br. s

2.27, m

1.82, m

6

1.04, m

0.64, br. s

0.77, t (10.3)

β 1.57, m; α 1.49, m

7

0.84, m

1.00, m

0.57, m

α 2.36, m; β 2.03, m

8

α 1.40, m; β 0.81, m

α 1.42, m; β 0.83, m

β 1.67, m; α 1.54, m

—

9

β 1.65, m; α 0.53, dddd (12.1, 12.1, 12.1, 1.9)

β 1.61, m; α 0.51, q (12.4)

α 2.26, m; β 2.16, m

2.27, m

10

1.71, m

1.70, m

—

α 1.61, m; β 1.56, m

11

1.52, m

1.56, m

—

—

12

0.89, d (6.6)

0.93, d (6.6)

β 1.02, s

α 0.87, s

13

0.85, d (6.6)

0.90, d (6.7)

α 1.15, s

β 0.93, s

14

1.00, d (6.3)

0.75, d (6.2)

1.72, s

1.00, s

15

α 2.27, dd (14.1, 7.2); β 1.99, dd (14.1, 10.4)

1.08, s

1.08, s

4.83, br.s; 4.80, br.s

1′

4.17, dd (10.4, 7.2)

4.20, br. s

4.39, br. s

 —

9′/13′

7.14, m

7.09, d (7.5)

7.27, m

7.40, m

10′/12′

7.28, m

7.28, t (7.5)

7.24, m

7.39, m

11′

7.21, m

7.20, t (7.5)

7.19, t (6.7)

7.47, m

14′

10.12, s

10.18, s

10.22, s

α 2.61, dd (16.6, 5.4); β 2.00, dd (16.6, 12.1)

15′

10.13, s

10.16, s

10.10, s

10.23, s

5′-OH

13.55, s

13.61, s

13.53, s

13.23, s

7′-OH

13.19, s

13.23, s

13.44, s

13.71, s