(S)-N,N-Diisopropyl-3-[(5-methoxycarbonyl)-2-hydroxy)phenyl]-3-phenyl-propylamine is an intermediate in the synthesis of (R)-5-Hydroxymethyl Tolterodine Formate (H949480), a metabolite of Tolterodine (T535800), a muscarinic receptor antagonist used in the treatment of urinary incontinence.