Tolterodine EP Impurity F

: Tolterodine (S)-Isomer; S-(-)-Tolterodine; 2-[(1S)-3-[Bis(1-methylethyl)amino]-1-phenylpropyl]-4-methyl-phenol D-Tartrate; (S)-Tolterodine; N,N-Diisopropyl-3(S)-(2-hydroxy-5-methylphenyl)-3-phenylpropan-1-amine