SKF-89976ASKF-89976A is an anticonvulsant, acting as a GABA reuptake inhibitor via blockade of GAT-1.SynthesisEx 1: Finkelstein Sn2 alkylation between 1,1-Diphenyl-4-bromobutene & Ethyl nipecotate gives . Optional saponification of the ester group gives the title amino-acid compound.