difemerine difemerine difemerine is a little known antimuscarinic drug sold under the name luostyl. difemerineclinical dataahfs/drugs.cominternational drug namesatc codea03aa09 (who) identifiers iupac name 2-(dimethylamino)-2-methylpropyl 2-hydroxy-2,2-diphenylacetate cas number80387-96-8pubchem cid165124chemspider10662416unii843c4upz2fkeggd07079 ychemblchembl2106534chemical and physical dataformulac20h25no3molar mass327.424 g·mol−13d model (jsmol)interactive image smiles oc(c(=o)oc(c)(c)cn(c)c)(c1ccccc1)c2ccccc2 inchi inchi=1s/c20h25no3/c1-19(2,15-21(3)4)24-18(22)20(23,16-11-7-5-8-12-16)17-13-9-6-10-14-17/h5-14,23h,15h2,1-4h3key:wjizvqnujvmjaz-uhfffaoysa-n (verify)