Notes: (±)-O-Desmethyl venlafaxine-d6 (Item No. 15843) is an analytical reference standard intended for use as an internal standard for the quantification of (±)-O-desmethyl venlafaxine by GC- or LC-MS. (±)-O-Desmethyl venlafaxine is a metabolite of the antidepressant venlafaxine (Item Nos. 25524 / 11567).{32155} This product is intended for research and forensic applications.