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3-Chloro-6-trifluoromethyl-pyridazine 3-CHLORO-6-PROPYLOXYPYRIDAZINE 3-CHLORO-6-ISOPROPOXYPYRIDAZINE 3-Chloro-6-hydrazinopyridazine 6-Chloro-N-ethylpyridazin-3-amine 6-CHLOROPYRIDAZINE-3-THIOL 3-CHLORO-6-PHENOXYPYRIDAZINE Chloridazon 3-Chloro-6-phenyl-pyridazin-4-ol 1-CHLORO-4-(4-METHYLPHENYL)PHTHALAZINE