1-Piperidineacetamide, N-(2,3,5,6-tetramethylphenyl)-, monohydrochloride 57116-01-5 N-(2,3,5,6-Tetramethylphenyl)-1-piperidineacetamide hydrochloride omega-Piperidino-2,3,5,6-tetramethylacetanilide hydrochloride