4H-Pyran-2-carboxylic acid, 6-((4-methyl-1-piperazinyl)carbonyl)-4-oxo-, ethyl ester, monohydrochloride 6-((4-Methyl-1-piperazinyl)carbonyl)-4-oxo-4H-pyran-2-carboxylic acid ethyl ester HCl 86525-24-8 Ethyl N-methylpiperazine amide pyranedicarboxylate hydrochloride N-Methylpiperazinamide monoethyl pyranedicarboxylate hydrochloride