thonzylamine thonzylamine thonzylamine (or neohetramine) is an antihistamine and anticholinergic used as an antipruritic. thonzylamineclinical dataother namesneohetramineahfs/drugs.cominternational drug namesatc coded04aa01 (who) r01ac06 (who) r06ac06 (who)identifiers iupac name n-(4-methoxybenzyl)-n',n'-dimethyl-n-pyrimidin-2-ylethane-1,2-diamine cas number91-85-0 n 63-56-9pubchem cid5457chemspider5258 yuniir79646h5z8keggd08587 ychemblchembl1623738 ncomptox dashboard (epa)dtxsid8043864 echa infocard100.001.913 chemical and physical dataformulac16h22n4omolar mass286.379 g·mol−13d 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 ykey:gulnihoswfymrn-uhfffaoysa-n y ny (what is this?) (verify) synthesis thonzylamine synthesis: h. l. friedman and a, v. tolstouhov, u.s. patent 2,465,865 (1949).