α1 adrenoceptor-MO-1, an S enantiomer, has affinity at alpha 1 adrenergic receptor, shows alphalytic activity, and possesses analgesic action; more active than R enantiomer.
α1 adrenoceptor-MO-1 (the S enantiomer) and R enantiomer are more active than the corresponding racemates, but α1 adrenoceptor-MO-1 is more active than R enantiomer[1].
[1]. Pharmacologically active enantiomers. WO 1995001354 A1