Notes: (2S)-Octyl-α-hydroxyglutarate-d17 is intended for use as an internal standard for the quantification of (2S)-octyl-α-hydroxyglutarate (Item No. 16367) by GC- or LC-MS. (2S)-Octyl-α-hydroxyglutarate is a cell-permeable derivative of the L-isomer of α-hydroxyglutarate (Item No. 16374).