desfesoterodine desfesoterodine desfesoterodine (inn, also called 5-hydroxymethyltolterodine) is an antimuscarinic drug. it is the active metabolite of fesoterodine, its isobutyrate ester. desfesoterodineclinical dataatc codeg04bd13 (who) identifiers iupac name 2--4-(hydroxymethyl)phenol cas number207679-81-0pubchem cid9819382chemspider7995131uniiyu871o78grkeggd10853comptox dashboard (epa)dtxsid40431319 echa infocard100.228.649 chemical and physical dataformulac22h31no2molar mass341.495 g·mol−13d model (jsmol)interactive image smiles cc(c)n(cc(c1=cc=cc=c1)c2=c(c=cc(=c2)co)o)c(c)c inchi inchi=1s/c22h31no2/c1-16(2)23(17(3)4)13-12-20(19-8-6-5-7-9-19)21-14-18(15-24)10-11-22(21)25/h5-11,14,16-17,20,24-25h,12-13,15h2,1-4h3/t20-/m1/s1key:duxzaxcgjsbgdw-hxuwfjfhsa-n