NEW ENANTIOMER-FREE -AGONISTS, THEIR PREPARATION METHOD AND THEIR APPLICATION IN CAPACITY OF MEDICATIONS

摘要

FIELD: pharmacology. ^ SUBSTANCE: described are enantiomer-free compounds with a general formula of (1) wherein the R1, R2, R3, R4 and X- residue may have as specified in the invention formula, intermediary compounds, a pharmaceutical composition as well as their application in the capacity of medications intended for respiratory tract diseases treatment. ^ EFFECT: new enantiomer-free b-agonists, their preparation method and application in the capacity of medications. ^ 11 cl, 5 dwg, 3 tbl, 37 ex