[S-(R*,S*)]-α-(1-Aminoethyl)-4-chlorobenzenemethanol Hydrochloride is a chloro-derivative of (1S,2R)-Norephedrine Hydrochloride (N674405) and is used as a reagent in the synthesis of cyclic sulfonamide compounds which can serve as dual CCK1/CCK2 inhibitors for treatment of CCK1/CCK2 mediated diseases.