(+/-)-1,1-dimethylethyl 4-[2-{2-[3,5-bis(trifluoromethyl)phenyl]hydrazino}-2-oxo-1-(2-pyridinyl)ethyl]-1-piperazinecarboxylate
(S)-N'-[3,5-bis(trifluoromethyl)phenyl]-2-(1-piperazinyl)-2-(2-pyridinyl)acetohydrazide
(R)-N'-[3,5-bis(trifluoromethyl)phenyl]-2-(1-piperazinyl)-2-(2-pyridinyl)acetohydrazide
(+/-)-N'-[3,5-bis(trifluoromethyl)phenyl]-2-(1-piperazinyl)-2-(2-pyridinyl)acetohydrazide
(+/-)-potassium (4-{[(1,1-dimethylethyl)oxy]carbonyl}-1-piperazinyl)(2-pyridinyl)carboxylate