CE-123, or as the active enantiomer (S)-CE-123, is an analog of modafinil, the most researched of a series of structurally related heterocyclic derivatives.

[1][2][3] In animal studies, CE-123 was found to improve performance on tests of learning and memory in a manner consistent with a nootropic effect profile.

[4][5][6][7] (S)-CE-123 has pro-motivational effects in animals, reverses tetrabenazine-induced motivational deficits, and could be useful in the treatment of motivational disorders in humans.

[8][9]