133628-23-6 2-Methyl-N-(2-(dimethylamino)ethyl)-3-nitrothiophene-5-carboxamide hydrochloride 2-Thiophenecarboxamide, N-(2-(dimethylamino)ethyl)-5-methyl-4-nitro-, monohydrochloride N-(2-(Dimethylamino)ethyl)-5-methyl-4-nitro-2-thiophenecarboxamide monohydrochloride