Chemical structure of fipronil, a common<unk><unk><unk>  are a class of chemically-related broad-spectrum<unk> . The chemical structures of these<unk>  are characterized by a central pyrazole ring with a phenyl group attached to one of the nitrogen atoms of the pyrazole.
Phenylpyrazole insecticides
Phenoxy herbicide
Byzantine medicine
Perfluorinated compound
Chlorophenoxy herbicide
Antimetabolite
Polychlorinated naphthalene
Loline alkaloid