Fipamezole

Formula : C14-H15-F-N2
CAS : 150586-58-6 

An alpha2 adrenergic antagonist.

Fipronil sulfone

Formula : C12-H4-Cl2-F6-N4-O2-S
CAS : 120068-36-2 

Insecticide fipronil and its metabolite fipronil sulphone inhibit the rat alpha1beta2gamma2L GABA(A) receptor.