Provided are processes for the preparation of (R)-SLB.D-DBTA salt and levalbuterol hydrochloride. Also provided are levalbuterol hydrochloride degradation products and processes for preparing them. Pharmaceutical compositions comprising at least one levalbuterol hydrochloride of the invention and at least one pharmaceutically-acceptable excipient are also provided.
提供了制备(R)-SLB.
D-DBTA盐和
盐酸左布托尔的过程。还提供了左布托尔盐酸盐的降解产物和制备它们的过程。还提供了包含本发明至少一种左布托尔盐酸盐和至少一种药用可接受的赋形剂的制药组合物。