By condensation of 2-(3-methoxyphenyl)tetradecanenitrile (I) [prepared by alkylation of 3-methoxyphenylacetonitrile (III) with 1-bromoundecane (IV) with 1-chloro-4-methyl-6-(3-methoxyphenyl)-4-azahexane (II) (prepared by alkylation of N-methyl-[2-(3-methoxyphenyl)ethylamine (VI) with 1-bromo-3-chloropropane (V)) by means of sodium amide in refluxing toluene.