Title: Oxomemazine
CAS Registry Number: 3689-50-7
CAS Name: N,N,b-Trimethyl-10H-phenothiazine-10-propanamine 5,5-dioxide
Additional Names: 10-(3-dimethylamino-2-methylpropyl)phenothiazine 5,5-dioxide; 3-(9,9-dioxo-10-phenothiazinyl)-2-methyl-1-dimethylaminopropane
Manufacturers' Codes: RP-6847
Trademarks: Dysedon
Molecular Formula: C18H22N2O2S
Molecular Weight: 330.44
Percent Composition: C 65.43%, H 6.71%, N 8.48%, O 9.68%, S 9.70%
Literature References: Prepn: Jacob, Robert, US 2972612 (1961 to Rhône-Poulenc).
Properties: Crystals from heptane, mp 115°.
Melting point: mp 115°
Derivative Type: Hydrochloride
Trademarks: Doxergan; Imakol (Rh>e-Poulenc)
Molecular Formula: C18H22N2O2S.HCl
Molecular Weight: 366.91
Percent Composition: C 58.92%, H 6.32%, N 7.63%, O 8.72%, S 8.74%, Cl 9.66%
Properties: Crystals from ethanol + isopropanol, mp 250°.
Melting point: mp 250°
Oxonic Acid Oxophenarsine Hydrochloride Oxophenylarsine Oxotremorine Oxprenolol

Systematic (IUPAC) name
Clinical data
AHFS/Drugs.com International Drug Names
Legal status Not approved (US)
CAS number 3689-50-7 YesY
ATC code R06AD08
PubChem CID 19396
ChemSpider 18281 YesY
UNII 305MB38V1C YesY
KEGG D07401 YesY
Chemical data
Formula C18H22N2O2S 
Mol. mass 330.444 g/mol
 N (what is this?)  (verify)

Oxomemazine is an antihistamine and anticholinergic of the phenothiazine chemical class for the treatment of cough.[1][2]