noun. An organic univalent radical, occurring in a number of compounds, most of which are prepared from isobutyl alcohol, a constituent of fusel-oil.

noun. The univalent hydrocarbon radical derived from isobutanol

"The marketing of Sechuan Buttons brandishes an element of the narcotic with the culinary, as well it should; the active ingredient in Acmella oleracea which produces unique sensations in the mouth is the molecule spilanthol N-isobutyl-4, 6-decadienamide."

acetanilide  acrylate  amyl  azulene  benzyl