Thonzylamine

Thonzylamine
Clinical data
Other names	Neohetramine
AHFS/Drugs.com	International Drug Names
ATC code	D04AA01 ( WHO ) R01AC06 ( WHO ) R06AC06 ( WHO );
Identifiers
	IUPAC name N-(4-methoxybenzyl)-N',N'-dimethyl-N-pyrimidin-2-ylethane-1,2-diamine;
CAS Number	91-85-0 63-56-9 ;
PubChem CID	5457 ;
ChemSpider	5258 ;
UNII	R79646H5Z8 ;
KEGG	D08587 ;
ChEMBL	ChEMBL1623738 ;
CompTox Dashboard (EPA)	DTXSID8043864 ;
ECHA InfoCard	100.001.913
Chemical and physical data
Formula	C16H22N4O
Molar mass	286.379 g·mol−1
3D model (JSmol)	Interactive image ;
	SMILES n1cccnc1N(CCN(C)C)Cc2ccc(OC)cc2;
	InChI InChI=1S/C16H22N4O/c1-19(2)11-12-20(16-17-9-4-10-18-16)13-14-5-7-15(21-3)8-6-14/h4-10H,11-13H2,1-3H3 ; Key:GULNIHOSWFYMRN-UHFFFAOYSA-N ;
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Last updated January 02, 2026

Thonzylamine (or neohetramine)^[1] is an antihistamine and anticholinergic used as an antipruritic.

Synthesis

Thonzylamine synthesis: H. L. Friedman and A, V. Tolstouhov, U.S. patent 2,465,865 (1949).

References

↑ Arminio JJ, Sweet CC (December 1949). "The prophylaxis and treatment of the common cold with neohetramine (thonzylamine hydrochloride)". Industrial Medicine & Surgery. 18 (12): 509–11. PMID 15393969.

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[1] Arminio JJ, Sweet CC (December 1949). "The prophylaxis and treatment of the common cold with neohetramine (thonzylamine hydrochloride)". Industrial Medicine & Surgery. 18 (12): 509–11. PMID 15393969.

[1]

v t e Antipruritics (D04)
Antihistamines for topical use	Bamipine Chloropyramine Chlorphenoxamine Clemastine Dimetindene Diphenhydramine Isothipendyl Mepyramine Pheniramine Promethazine Thenalidine Thonzylamine Tolpropamine Tripelennamine
Anesthetics for topical use	Benzocaine Cinchocaine Dibucaine Lidocaine Oxybuprocaine Pramocaine Quinisocaine Tetracaine
Others	Corticosteroids (e.g., hydrocortisone) Counterirritants (e.g., mint oil, menthol, camphor) Difelikefalin Doxepin Nalfurafine

v t e Antihistamines (R06)
Benzimidazoles (*)	Astemizole Azelastine Bilastine Emedastine Mizolastine Talastine
Diarylmethanes	Diarylmethoxyalkylamines: Bromazine (bromodiphenhydramine) Carbinoxamine Chlorphenoxamine Clemastine Diphenhydramine (+naproxen) Diphenylpyraline Doxylamine Ebastine Orphenadrine Diphenylmethanolpiperidines : Fexofenadine Terfenadine Diphenylmethylpiperazines : Buclizine Cetirizine Levocetirizine Chlorcyclizine Cinnarizine Cyclizine Etodroxizine Hydroxyzine Meclizine Oxatomide Phenylpyridinylpropanamines: Brompheniramine Chlorphenamine Dexbrompheniramine (+pseudoephedrine) Dexchlorpheniramine (+betamethasone) Pheniramine Others: Acrivastine Bamipine Dimetindene Phenyltoloxamine Pyrrobutamine Quifenadine Triprolidine
Ethylenediamines	Antazoline Chloropyramine Histapyrrodine Mepyramine (pyrilamine) Methapyrilene Phenbenzamine Thenalidine Tripelennamine (pyribenzamine)
Tricyclics	Dibenzocycloheptenes : Antidepressants (e.g., amitriptyline) Azatadine Cyproheptadine Deptropine Desloratadine Ketotifen Loratadine Rupatadine Phenothiazines : Alimemazine Fenethazine Hydroxyethylpromethazine Isothipendyl Mequitazine Methdilazine Oxomemazine Promethazine Others: Antidepressants (e.g., doxepin, mirtazapine, trimipramine) Epinastine Latrepirdine Mebhydrolin Olopatadine Perlapine Phenindamine Pimethixene
Others	Phenylpiperazines: Antidepressants (e.g., trazodone) Phenbenzamine
For topical use	Bamipine Chloropyramine Chlorphenoxamine Clemastine Dimetindene Diphenhydramine Doxepin Isothipendyl Mepyramine (pyrilamine) Promethazine

Thonzylamine

Contents

Synthesis

See also

References