oxyphenonium bromide oxyphenonium bromide oxyphenonium bromide is an antimuscarinic drug. it is used to treat gastric and duodenal ulcers and to relieve visceral spasms. oxyphenonium bromideclinical dataahfs/drugs.cominternational drug namesatc codea03ab03 (who) identifiers iupac name 2-(2-cyclohexyl-2-hydroxy-2-phenylacetoxy)-n,n-diethyl-n-methylethanaminium bromide cas number50-10-2 ypubchem cid5748chemspider5546 nuniis9421hwb3zkeggd06877 nchemblchembl1200906 ncomptox dashboard (epa)dtxsid4045632 echa infocard100.000.010 chemical and physical dataformulac21h34brno3molar mass428.411 g·mol−13d model (jsmol)interactive image smiles oc(c(=o)occ(c)(cc)cc)(c1ccccc1)c2ccccc2. inchi inchi=1s/c21h34no3.brh/c1-4-22(3,5-2)16-17-25-20(23)21(24,18-12-8-6-9-13-18)19-14-10-7-11-15-19;/h6,8-9,12-13,19,24h,4-5,7,10-11,14-17h2,1-3h3;1h/q+1;/p-1 nkey:uklqxhugtkwpsr-uhfffaoysa-m n ny (what is this?) (verify)