Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 6-(4-Phenyl-benzyloxy-methyl) guvacine was synthesized. Surprisingly the compound was devoid of the γ-aminobutyric acid (GABA) uptake inhibitory activity of its parent compound guvacine, but instead showed affinities for the muscarinic M 1 and M 2 receptors.