The crystal structure of N-[3-(3,4-dimethylphenyl)propyl] (4-hydroxy-3
-methoxyphenyl) acetamide, C20H25NO3, was determined to a final R valu
e of 0.047. The vanilloid, amide and dimethylphenyl groups of the comp
ound are nearly perpendicular with respect to one another. The overall
conformation in the crystalline state is somewhat different from that
of other capsaicinoids. The molecules are stabilized by intermolecula
r hydrogen bonds.