Table 2.
1H and 13C NMR data of cyclo(Arg-Trp) from Gevuina avellana cotyledons. Pos. Position; COSY: correlation spectroscopy; NOESY: Nuclear Overhauser Effect Spectroscopy; HSQC: heteronuclear single-quantum correlation spectroscopy; HMBC: heteronuclear multiple-bond correlation spectroscopy.
 | |||||
|---|---|---|---|---|---|
| Pos. | δH (J in Hz) | COSY | NOESY | 13C/HSQC | HMBC |
| 1 | 3.36 m | 48.17 d | |||
| 3 | — | 173.99 s | |||
| 4 | 4.75 dd (8.4, 4.4) | H12 | H12 | 53.26 d | C12, C13 |
| 6 | — | 173.77 s | |||
| 7 | 2.21 m (2 H) | H8 | H8, H9 | 31.66 t | C6, C8, C9 |
| 8 | 1.70 m (2 H) | H7, H9 | H7, H9 | 24.37 t | C6, C7, C9 |
| 9 | 3.00 m (2 H) | H8 | H7, H8 | 40.11 t | C7, C8, C11 |
| 11 | — | 157.26 s | |||
| 12 | 3.37 dd (14.6, 4.4)3.15 dd (14.6, 8.8) | H4, H12, H14 | H4 | 27.06 t | C3, C4, C13, C14, C17 |
| 13 | — | 109.67 s | |||
| 14 | 7.09 s | H12 | 123.06 d | C12, C16, C17 | |
| 16 | — | 136.62 s | |||
| 17 | — | 127.38 s | |||
| 18 | 7.55 d (7.6) | H19 | H19 | 117.81 d | C13, C16, C17, C20 |
| 19 | 7.00 dd (7.6, 7.2) | H18 | H18, H20 | 118.43 d | C17, C21 |
| 20 | 7.08 dd (7.6, 7.2) | H21 | H19, H21 | 121.04 d | C16, C18 |
| 21 | 7.32 d (7.6) | H20 | H20 | 110.94 d | C17, C19 |