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| 1,1,1-trialo-4-alkoxy-3-alken-2-ones (1) |
| 1,1-trialo-4-alcoxi-3-alquen-2-onas (1) |
| 1H-pirazol (1) |
| 1H-pirazol-carboxilatos (1) |
| 1H-pyrazole (1) |
| 1H-pyrazole carboxylates (1) |
| Acetyl acylation (1) |
| Acilação de acetais (1) |
| Heterociclos (1) |
| Heterocycles (1) |