omeprazole R-Isomer

Omeprazole R-Isomer is the enantiomer of the S-configured parent drug, featuring a chiral sulfinyl center at the 4-position of the benzimidazole moiety. Its structure incorporates a pyridine ring, a methylsulfinyl group, and a substituted phenyl group, with the R-configuration leading to distinct stereochemical interactions. This impurity arises during asymmetric synthesis or racemic resolution processes of omeprazole. It serves as a critical HPLC reference standard for enantiomeric purity analysis in API quality control.