N,N-Bis(1-methylethyl)-γ-(4-methylphenoxy)benzenepropanamine Hydrochloride-d7, is the labeled analogue of N,N-Bis(1-methylethyl)-γ-(4-methylphenoxy)benzenepropanamine Hydrochloride (B495100), which can be used in the synthesis of Tolterodine (T535800), a muscarine receptor antagonist.