2-(3,4-Dimethoxyphenyl)-2-isopropyl-d7-5-oxopentanenitrile is an intermediate in the synthesis of Norverapamil-d7 hydrochloride, a labeled metabolite of Verpamil Hydrochloride (V125000), a calcium channel blocker. Antihypertensive; antianginal; antiarrhythmic (class IV).