| L1 | L2 | L3 | Assignments |
| 6.9 - 7.5 (br, m) | 6.8 - 7.4 (br, m) | 6.8 - 7.6 (br, m) | Phenyl multiplet |
| 2.4 (sh, s) | - | - | =C-CH3 |
| 3.2 (sh, s) | - | - | -N-CH3 |
| 9.7 (sh, s) | 8.6 (sh, s) | 8.9 (sh, s) | -CH=N- |
| - | 13.4 (sh, s) | 9.8, 13.8 (sh, s) | -OH |
| - | 3.9 (sh, s) | - | -CH2- |