pipenzolate bromide pipenzolate bromide pipenzolate bromide is a pharmaceutical drug that has been studied as an antispasmodic agent and to treat peptic ulcer. pipenzolate bromideclinical dataatc codea03ab14 (who) identifiers iupac name 1-ethyl-3--1-methylpiperidinium bromide cas number125-51-9 ypubchem cid657306chemspider571430 nuniijpx41dus2bchemblchembl1401367 ncomptox dashboard (epa)dtxsid2023480 echa infocard100.004.311 chemical and physical dataformulac22h28brno3molar mass434.374 g·mol−13d model (jsmol)interactive image smiles cc1(cccc(c1)oc(=o)c(c2ccccc2)(c3ccccc3)o)c. inchi inchi=1s/c22h28no3.brh/c1-3-23(2)16-10-15-20(17-23)26-21(24)22(25,18-11-6-4-7-12-18)19-13-8-5-9-14-19;/h4-9,11-14,20,25h,3,10,15-17h2,1-2h3;1h/q+1;/p-1 nkey:xedcwwfpzmhxcm-uhfffaoysa-m n ny (what is this?) (verify) mechanism of action pipenzolate bromide acts as an antimuscarinic agent. it binds to muscarinic acetylcholine receptors as an antagonist therefore preventing acetylcholine from binding to the receptors.