Methyl ((S)-4-Methyl-2-[2-oxo-2-[[(S)-1-phenylethyl]amino]ethyl]pentyl]carbamate is used in the synthetic preparation of (S)-Pregabalin (P704790), S-enantiomer of Pregabalin which is anxiolytic analgesic used to treat peripheral neuropathic pain and fibromyalgia.