Histamine trifluoromethyl toluidide Tags: Chemical Compound, Chemical Substance.Histamine trifluoromethyl toluidide (HTMT) is a mixed H1/H2 histamine agonist which is significantly more potent than histamine itself.It also produces additional actions which appear to be independent of histamine receptors. thumbnail IUPAC name 6-[2-(3H-imidazol-4-yl)ethylamino]-N-[4-(trifluoromethyl)phenyl]heptanamide Learn more... Loading...