Table 1 ¹H NMR data of flavichalasines A–E (1–5) in CD₃OD (J in Hz).

3.26 m

3.23 ddd (8.7, 5.1, 2.3)

3.26 ddd (8.7, 5.6, 2.0)

3.26 ddd (8.7, 5.2, 2.5)

3.26 ddd (8.6, 5.2, 2.2)

3.11 m

2.92 dd (5.9, 2.3)

3.06 dd (6.0, 2.0)

3.11 dd (6.1, 3.7)

2.96 dd (5.9, 2.2)

2.40 m

2.41 m

2.39 m

2.45 m

2.48 m

5.54 br s

6.14 br s

5.52 br s

5.53 br s

5.74 br s

2.40 m

2.46 br d (12.0)

2.25 br d (12.4)

2.53 m

2.50 m

1.31 m

1.32 ddd (13.7, 8.7, 5.1) 1.21 ddd (13.7, 8.7, 5.1)

1.23 m

1.26 m

1.40 m; 1.29 m

1.25 d (7.3)

1.24 d (7.2)

1.24 d (7.3)

1.26 d (7.3)

1.26 d (7.2)

1.76 s

1.79 br s

1.79 br s

1.82 s

1.80 br s

4.02 t (11.7)

3.35 dd (12.0, 5.3)

3.01 t (12.4)

2.99 dd (13.3, 12.1)

3.87 t (11.9)

2.43 m

2.06 m

1.83 m

1.92 m

1.64 m

2.28 m

1.50 m

1.47 m

1.65 m

1.87 m

1.96 m

2.64 m

2.48 m

1.97 m

1.80 m

1.50 m

1.86 m

2.01 m

1.49 m

4.51 dd (7.2, 4.2)

3.75 m

4.41 td (8.3, 1.9)

4.36 dd (9.6, 2.2)

3.68 dd (9.2, 6.9)

1.55 m

4.35 dd (8.1, 5.2)

3.08 t (11.7)

2.76 m

1.79 m

3.08 dd (13.3, 10.2)

3.26 ddd (8.6, 5.2, 2.2)

5.19 d (11.7)

3.53 dd (12.8, 6.2) 2.14 dd (12.8, 3.4)

5.16 d (11.6)

5.08 d (10.2)

4.88 d (12.1)

1.64 m

1.60 m

1.61 m

1.61 m

1.63 m

0.94 d (6.4)

0.91 d (6.3)

0.91 d (6.2)

0.91 d (6.6)

0.93 d (6.4)

0.92 d (6.5)

0.93 d (6.3)

0.92 d (6.2)

0.93 d (6.6)

0.94 d (6.4)

5.08 s 4.79 s

1.28 s

1.22 s

1.42 s

1.42 s