In edible pepper, the materials which have spice taste are generally called capsaicinoids which are made up by more than ten kinds of compound in capsaicin’s type. The major compounds are capsaicin, Dihydrocapsaicin, Nordihydrocapsaicin and so on.
Chemical name:  8-methyl-N-vanillyl-nonamide
Molecular formula: C₁₈H₂₉NO₃
Molecular weight: 307.4
Chemical structural: