Ethyl 4-((6-(4-(N-(tert-Butoxycarbonyl)carbamimidoyl)phenoxy)hexyl)oxy)benzoate is an intermediate in synthesizing Ethyl 4[[6-(4-Carbamimidoylphenoxy)hexyl]oxy]benzoate (E900963). It is an impurity of Hexamidine Diisetionate (H294205), which is an amidine compound used in the treatment of amyloid-related diseases; it is also used as preservative in cosmetics as an antispetic.