3-(((t-Butoxycarbonyl)amino)methyl)-5-methylhex-5-enoic Acid is an intermediate in synthesizing (S)-5,6-Dehydro Pregabalin (D230270), derived from rac 5,6-Dehydro Pregabalin (D230055), which is an impurity of the anti-convulsant, Pregabalin (P704800).