No.

δ_C compound 1

δ_C GDA

δ_H compound 1

δ_H GDA

HMBC (H→C)

COSY

NOESY

1

169.7 C

169.1

-

-

-

-

-

2

133.2 C

133.2

-

-

-

-

-

2-Me

12.8 CH₃

12.2

1.93 s

1.91, s

1, 2, 3, 4

-

-

3

128.7 CH

128.4

6.95 d

6.95, d

-

4

NH, 4, 6, 7

4

126.3 CH

125.7

6.58 t

6.56, t

2, 6

3, 5

3, 5

5

138.7 CH

137.8

5.81 br

5.80, t

-

4, 6

4, 6

6

82.3 CH

81.6

4.36 d (7.6)

4.34, d

4, 6-OMe

5, 7

3, 5, 7

6-OMe

57.1 CH₃

56.0

3.24 s

3.22, s

6

-

-

7

81.1 CH

80.6

4.88 br

4.86, br

5, 7-OCONH₂, 9, 8-Me

6

3, 6, 9

7-OCONH₂

156.6 C

156.0

-

6.45, br

-

-

-

8

129.1 C

132.6

-

-

-

-

-

8-Me

13.0 CH₃

12.5

1.62 s

1.61, s

7, 9

-

10

9

132.4 CH

131.9

5.50 d (8.5)

5.51, d

7, 8-Me

10

7

10

32.6 CH

32.1

2.56

3.61, m

-

9, 10-Me

8-Me, 10-Me, 11, 12

10-Me

23.4 CH₃

23.3

0.75 d (6.8)

0.97, d

9, 10, 11

10

10, 11, 12

11

72.4 CH

71.9

3.09 br

3.29, s

10-Me

-

10, 10-Me, 13, 14

11-OH

-

-

-

-

-

-

-

12

80.7 CH

80.2

3.09 br

3.07, m

12-OMe

13

10, 10-Me, 13, 14

12-OMe

56.5 CH₃

56.6

3.23 s

3.23, s

12

-

-

13

31.3 CH₂

31.0

1.45 br

1.45, m

14-Me

12, 14

11, 12, 14

14

27.1 CH

26.6

1.93 s

1.91, br

12, 16

13, 14-Me, 15a, 15b

13

14-Me

23.9 CH₃

23.0

0.97 br

0.76, d

14, 15

14

-

15a

32.2 CH₂

31.7

2.43 dd (12.5, 9.9)

2.42, m

13, 14, 16, 17, 21

14, 15b

-

15b

31.7

2.18 dd (12.5, 4.8)

13, 14, 16, 17, 21

14, 15a

-

16

128.7 C

128.1

-

-

-

-

-

17

156.9 C

156.4

-

-

-

-

-

17-OMe

61.6 CH₃

61.0

3.96 s

3.93, s

17

-

-

18

184.3 C

183.6

-

-

-

-

-

19

111.3 CH

110.9

7.04 s

7.02, s

-

-

-

20

140.1 C

139.6

-

-

-

-

-

21

183.6 C

183.1

-

-

-

-

-

NH

-

-

9.18, NH, br

9.14, NH, br

1, 19, 21

-

3