Bietamiverine or-dihydrochloride or -hydrochloride

4-Biphenylacetonitrile on condensation reaction with ethyl phenyl propiolate yields biphenyl derivatives of acetylenic &#946-ketocyanide . Application 4-Biphenylacetonitrile was used to study the adsorption orientation of the biphenyl derivatives

4-Biphenylacetonitrile on condensation reaction with ethyl phenyl propiolate yields biphenyl derivatives of acetylenic &#946-ketocyanide . Application 4-Biphenylacetonitrile was used to study the adsorption orientation of the biphenyl derivatives