oxomemazine oxomemazine oxomemazine is an antihistamine and anticholinergic of the phenothiazine chemical class for the treatment of cough. oxomemazineclinical dataahfs/drugs.cominternational drug namesatc coder06ad08 (who) legal statuslegal status us: not approved in general: ℞ (prescription only) identifiers iupac name 3-(5,5-dioxido-10h-phenothiazin-10-yl)-n,n,2-trimethylpropan-1-amine cas number3689-50-7 ypubchem cid19396chemspider18281 yunii305mb38v1ckeggd07401 ychemblchembl2104734 ncomptox dashboard (epa)dtxsid5023405 echa infocard100.020.906 chemical and physical dataformulac18h22n2o2smolar mass330.45 g·mol−13d model (jsmol)interactive image smiles o=s3(=o)c1ccccc1n(c2c3cccc2)cc(c)cn(c)c inchi inchi=1s/c18h22n2o2s/c1-14(12-19(2)3)13-20-15-8-4-6-10-17(15)23(21,22)18-11-7-5-9-16(18)20/h4-11,14h,12-13h2,1-3h3 ykey:qtqpvldzqvplgv-uhfffaoysa-n y ny (what is this?) (verify)