Butyl-[2-(3,4-dimethoxy-phenyl)-ethyl]-[2-(5-methoxy-2-phenylethynyl-phenyl)-1-methyl-ethyl]-amine

[2-(3,4-Dimethoxy-phenyl)-ethyl]-{2-[2-(4-isopropyl-phenylethynyl)-5-methoxy-phenyl]-1-methyl-ethyl}-methyl-amine

{4-[2-(2-{[2-(3,4-Dimethoxy-phenyl)-ethyl]-methyl-amino}-propyl)-4-methoxy-phenylethynyl]-phenyl}-dimethyl-amine

[2-(3,4-Dimethoxy-phenyl)-ethyl]-[2-(5-methoxy-2-phenylethynyl-phenyl)-1-methyl-ethyl]-methyl-amine

[2-(3,4-Dimethoxy-phenyl)-ethyl]-{2-[2-(4-fluoro-phenylethynyl)-5-methoxy-phenyl]-1-methyl-ethyl}-methyl-amine