Rivaroxyban S-isomer

Rivaroxyban S-isomer is the enantiomer of the anticoagulant rivaroxaban, differing in stereochemistry at the chiral center adjacent to the pyrazole ring. It retains the core structure of rivaroxaban, including a benzylsulfonamide moiety, a 1,2,3,4-tetrahydroquinolin-4-yl group, and a 5-methyl-1H-pyrazole-1-yl ring. The S-configuration at the stereocenter alters its pharmacological activity and enantiomeric purity profile. This compound serves as a chiral reference standard for HPLC enantiomer separation and quantification in rivaroxaban synthesis processes.