4-(4-chlorophenyl)sulfanyl-N-[2-[4-(4-chlorophenyl)sulfanylbutanoyl-methylamino]ethyl]-N-methylbutanamide

N-methyl-N-[2-[methyl-[4-(4-methylphenoxy)butanoyl]amino]ethyl]-4-(4-methylphenoxy)butanamide

N-methyl-N-[2-[methyl(5-phenoxypentanoyl)amino]ethyl]-5-phenoxypentanamide

[11-[2-[11-acetyloxyundecanoyl(methyl)amino]ethyl-methylamino]-11-oxoundecyl] acetate

N-methyl-N-[2-[methyl-(2-phenylacetyl)amino]ethyl]-2-phenylacetamide