Imidazole

ImidazoleImidazolidine

Natural derivatives

Histamine

2- (1H -imidazol-4-yl)-ethanamine

Antagonist of adrenaline in the human body. Potent vasodilator, contracts the bronchial excite the uterus. Responsible for many allergies and the anaphylactic shock. Catabolised by the enzyme histaminase . Neutralised by antihistamines.

Pilocarpine

(3S,4R)- 3-ethyl-4 -((1- methylimidazole-5-yl)methyl)-4,5-dihydrofuran-2(3 H)-one

Alkaloid extracted from Pilocarpus pennatifolius , a plant native to Paraguay:

Picture due to →       Manejoflorestal

Promotes sweating and saliva production, activates hair growth and narrows the pupils. Used in ophthalmology to treat glaucoma

A derivative of imidazolidine

Phenytoin

5,5-diphenylimidazolidine-2,4-dione

A current antiepileptic that has the skeleton of the Hydantoin (imidazolidine-2,4-dione):