diisopromine diisopromine diisopromine or disoprominum, usually as the hydrochloride salt, is a synthetic spasmolytic which neutralizes spastic conditions of the biliary tract and of the sphincter of oddi. it was discovered at janssen pharmaceutica in 1955. it is sold in south africa under the brand name agofell syrup as a mixture with sorbitol, and elsewhere as megabyl. diisopromineclinical dataatc codea03ax02 (who) identifiers iupac name n,n-diisopropyl-3,3-diphenylpropan-1-amine cas number5966-41-6 ypubchem cid22262chemspider20899 yunii2825s6aw9ukeggd07092 ychemblchembl2106314comptox dashboard (epa)dtxsid60208343 echa infocard100.025.230 chemical and physical dataformulac21h29nmolar mass295.470 g·mol−13d model (jsmol)interactive image smiles c1ccccc1c(c2ccccc2)ccn(c(c)c)c(c)c inchi inchi=1s/c21h29n/c1-17(2)22(18(3)4)16-15-21(19-11-7-5-8-12-19)20-13-9-6-10-14-20/h5-14,17-18,21h,15-16h2,1-4h3 ykey:ybjkophejomrmn-uhfffaoysa-n y (verify)