(R)-2-(3-(diisopropylamino)-1-phenylpropyl)-4-(hydroxymethyl)phenyl isobutyrate fumarate (R)-Fesoterodine fumarate 2-[(1R)-3-[Bis(1-methylethyl)amino]-1-phenylpropyl]-4-(hydroxymethyl)phenyl 2-methylpropanoate fumarate (R)-2-(3-(Diisopropylamino)-1-phenylpropyl)-4-methoxyphenyl isobutyrate fumarate Fesoterodine maleate 2-[(1R)-3-[Bis(1-methylethyl)amino]-1-phenylpropyl]-4-(hydroxymethyl)phenyl 2-methylpropanoate fumarate Propanoic acid, 2-methyl-, 2-((1R)-3-(bis(1-methylethyl)amino)-1-phenylpropyl)-4-(hydroxymethyl)phenyl ester, (2E)-2-butenedioate (1:1) (salt) Spm 8272 Toviaz