The compound
2-[(1R)-3-(diisopropylamino)-1-phenylpropyl]-4-(trifluoromethyl) phenol
may be used to prepare the compound
(3R)-3-[2-hydroxy-5-(trifluoromethyl)phenyl]-N,N-diisopropyl-N-methyl-3-p-
henylpropan-1-aminium bromide by reaction with methyl bromide.