abstract |
The invention relates to a process for preparingn(1R,2S,4R)-(-)-2-[(2'-{N,N-dimethylamino}-ethoxy)]-2--[phenyl]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptanenandnpharmaceutically acceptable acid addition salts thereof withnhigher yields and higher grades of purity. |