Table 2 ¹³C and ¹H NMR data of rubrofusarin B (2) and fonsecin (3) in CDCl₃ (J in [Hz])

δ _c

δ _H

δ _c

δ _H

2

167.4

-

100.0

-

2-CH₃

20.6

2.35 (s)

27.6

1.60 (s)

2-OH

-

-

-

6.95 (brs)

3

107.3

5.98 (s)

47.6

3.14 (d, 16.8), 2.72 (d, 16.8)

4

184.2

-

197.5

-

4a

104.3

-

102.5

-

5

162.6

-

164.2

-

5-OH

-

14.96 (s)

-

14.19 (s)

5a

108.4

-

105.2

-

6

160.6

-

161.4

-

6-OCH3

56.0

3.99 (s)

55.6

3.84 (s)

7

97.2

6.38 (d, 2.2)

96.6

6.31 (brd, 1.1)

8

161.5

-

160.7

-

8-OH

-

-

-

10.18 (brs)

8-OCH3

55.4

3.91 (s)

-

-

9

97.8

6.56 (d, 2.2)

101.5

6.47 (s)

9a

141.0

-

142.9

-

10

101.0

6.94 (s)

101.0

6.41 (s)

10a

153.3

-

153.4

-