Notes: Desmethylcitalopram-d3 (hydrochloride) (Item No. 15840) is an analytical reference standard intended for use as an internal standard for the quantification of desmethylcitalopram (Item No. 15905) by GC- or LC-MS. Desmethylcitalopram is an active metabolite of citalopram (Item Nos. 23252 / 14572).{37245} This product is intended for research and forensic applications.