Table 1 ¹H and ¹³C NMR data of compound 1

1

34.29, C

-

2

36.02, CH₂

1.82 (td, 14, 5.2), 1.64 (ddt, 14, 6.8, 5.2)

3

38.25, CH₂

2.52 (m), 2.29 (m)

4

213.1, C

-

5

43.66, CH

2.92 (dq, 6.9, 6.6)

6

59.56, CH

2.32 (m)

7

134.78, CH

5.67 (dd, 15.5, 10.5)

8

137.58, CH

6.08 (d, 15.5)

9

154.05, C

-

10

118.05, CH

5.72 (br s)

11

171.65, C

-

12

14.28, CH₃

2.21 (d, 1.1)

13

13.12, CH₃

0.83 (d, 6.8)

14

29.75, CH₃

0.87 (s)

15

26.88, CH₃

1.34 (s)