Table 1 ¹H and ¹³C data for compounds (1–3) (500 MHz, 125 MHz, CDCl₃ or CD₃OD, δ in ppm)

1

7.72, s

111.1

7.75, s

112.1

6.53, s

100.4

2

-

143.9

-

143.6

-

144.0

3

-

149.2

-

149.3

-

149.0

4

6.43, s

100.3

6.44, s

100.5

8.43, s

110.0

4a

-

148.0

-

148.5

-

146.2

5

-

-

-

-

-

-

6

4.58,dd (10.2, 4.3)

67.1

4.42, dd (10.0, 4.3)

66.9

4.99, s

64.8

4.13, t (10.2)

4.00, t (10.0)

6a

4.33, dt (10.2, 4.3)

71.8

4.16, td (10.0, 4.3)

71.6

-

156.6

7

-

-

-

-

-

-

7a

-

155.9

-

154.8

156.7

8

-

116.9

6.39, d (2.6)

100.3

6.81, d (2.3)

100.2

9

-

147.5

-

160.3

-

163.9

10

7.21, d (8.1)

105.7

6.60, dd (10.0, 2.6)

107.9

6.98, dd (2.3, 8.9)

114.6

11

7.48, d (8.1)

123.6

7.43, d (10.0)

128.7

8.16, d (8.9)

127.5

11a

-

112.5

-

119.9

-

118.5

12

4.98, t (10.2)

70.7

4.74, d (10.0)

69.7

-

174.3

12a

3.15, t (10.2)

43.7

3.04,t (10.0)

42.3

-

111.9

12b

-

119.8

-

113.4

-

110.5

13

6.83, d (2.1)

103.8

-

-

-

-

14

7.58, d (2.1)

144.5

-

-

-

-

2-OCH₃

3.89, s

55.8

3.80, s

55.8

3.95, s

56.3

3-OCH₃

3.85, s

56.4

3.78, s

54.9

3.86, s

55.9

9-OCH₃

-

-

3.76, s

54.4

3.90, s

55.8

12-OH

1.95, d (10.2)

-

-

-

-

-