Table 1 ¹H and ¹³C NMR Data of 1–5.

2

165.1, C

161.0, C

160.9, C

163.4, C

162.9, C

3

90.3, CH

5.66, s

88.8, CH

5.53, s

88.6, CH

5.53, s

88.0, CH

5.48, s

89.3, CH

5.53, s

4

170.4, C

168.7, C

168.7, C

170.5, C

170.1, C

5

109.9, C

101.0, C

101.6, C

112.0, C

112.5, C

6

154.0, C

175.4, C

173.0, C

167.0, C

160.1, C

7

138.3, C

37.0, CH

2.76, qd (7.2, 3.0)

38.4, CH

2.86, dq (9.1, 7.0)

77.4, C

2.06, dq (14.6, 7.4)

140.6, C

8

65.7, CH

4.76, q (6.3)

73.9, CH

4.69, qd (6.5, 3.0)

77.2, CH

4.32, dq (9.1, 6.3)

34.8, CH₂

1.75, dq (14.6, 7.4)

70.3, CH

5.47, q (6.6)

9

18.1, CH₃

1.47, d (6.3)

16.6, CH₃

1.43, d (6.5)

19.1, CH₃

1.51, d (6.3)

8.1, CH₃

0.91, t (7.4)

20.2, CH₃

1.45, d (6.6)

10

114.6, CH₂

5.95, br. s;

5.47, br. S

10.4, CH₃

1.31, d (7.2)

12.7, CH₃

1.37, d (7.0)

28.2, CH₃

1.58, s

120.9, CH₂

5.67, s

5.55, s

11

94.8, CH

5.38, s

159.4, C

158.9, C

53.1, CH₂

4.75, d (12.2);

4.70, d (12.2)

55.7, CH₂

4.42, d (12.2)

4.37, d (12.2)

4-OCH₃

57.5, CH₃

3.90, s

56.9, CH₃

3.94, s

56.9, CH₃

3.94, s

56.5, CH₃

3.87, s

56.4, CH₃

3.88, s

11-OCH₃

56.0, CH₃

3.47, s

8-OAc

170.3, C

21.0, CH₃

2.04, s