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Some novel analogues derived, corresponding with Figure 6, above.
| Compound Number | R1 | R2 | R3 |
|---|---|---|---|
| 1 | OH | - | - |
| 30 | OCH3 | CHO | - |
| 31 | OC2H5 | CHO | - |
| 32 | OCH(CH3)2 | CHO | - |
| 33 |
|
CHO | - |
| 34 |
|
CHO | - |
| 35 | OCH2CH2CH3 | CHO | - |
| 36 | OH | - | OCOCH3 |
| 37 | Cl | - | OCOCH3 |
| 38 |
|
- | OCOCH3 |
| 39 |
|
- | OCOCH3 |
| 40 |
|
- | OCOCH3 |
| 41 |
|
- | OCOCH3 |
