CITALOPRAM R-ISOMER OXALATE SALT

Citalopram R-isomer oxalate salt is the enantiomerically pure (R)-configuration counterpart of the racemic antidepressant citalopram, featuring a chiral center at the pyrrolidinyl ring. The compound retains the core structure of citalopram, including a fluoro-substituted benzene ring and a piperidinyl group, with the oxalate counterion forming a stable zwitterionic salt. This isomer exhibits distinct pharmacokinetic properties compared to the S-isomer, primarily serving as a reference standard for enantiomeric purity analysis in chiral HPLC methods. Its oxalate salt form enhances crystallinity and solubility for analytical applications.