The molecule is a member of the class of 2,5-diketopiperazines that is piperazine-2,5-dione in which two hydrogen at position 3 and one hydrogen at position 6 are replaced by benzylidene and isobutyl groups respectively.
(3Z,6S)-3-benzylidene-6-(2-methylpropyl)piperazine-2,5-dione