1-Butyl-4-(2,4,4-trimethylallophanoyl)piperazine hydrochloride 1-Piperazinecarboxamide, 4-butyl-N-((dimethylamino)carbonyl)-N-methyl-, monohydrochloride 4-Butyl-N-((dimethylamino)carbonyl)-N-methyl-1-piperazinecarboxamide monohydrochloride 80712-51-2