| Compounds | Het |
|---|---|
| 3a | Thiophen-2yl |
| 3b | 3-Methylthiophen-2yl |
| 3c | 5-Methylthiophen-2yl |
| 3d | 5-Bromothiophen-2yl |
| 3e | 5-Nitrothiophen-2yl |
| 3f | Furan-2yl |
| 3g | 5-Methylfuran-2yl |
| 3h | 5-Nitrofuran-2yl |
| 3i | Pyridine-3yl |
| 3j | Pyridine-4yl |
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