2-hydroxy-2-oxoacetate; [3-(4-methylpiperazin-4-ium-1-yl)phenyl] acetate 2-hydroxy-2-oxo-acetate; [3-(4-methylpiperazin-4-ium-1-yl)phenyl] acetate acetic acid [3-(4-methyl-1-piperazin-4-iumyl)phenyl] ester; 2-hydroxy-2-oxoacetate acetic acid [3-(4-methylpiperazin-4-ium-1-yl)phenyl] ester bioxalate 2-hydroxy-2-oxo-ethanoate; [3-(4-methylpiperazin-4-ium-1-yl)phenyl] ethanoate