Naphthalen-2-ylmethyl Thiophene-2-carbimidothioate Hydrobromide is an intermediate in the synthesis of N-[3-(1,2,3,6-Tetrahydro-1-methyl-d3-4-pyridinyl)-1H-indol-5-yl]-2-thiophenecarboximidamide (T293452), the labeled analogue of N-[3-(1,2,3,6-Tetrahydro-1-methyl-4-pyridinyl)-1H-indol-5-yl]-2-thiophenecarboximidamide (T293450), a neuronal nitric oxide synthase(nNOS) inhibitor.