piperazine,phenylthioxomethyl,piperazine,
Piperazine
286456-37-9L-Tyrosine, 5-oxo-1-(phenylmethyl)-L-prolyl-, ethyl ester,4-methyl-1-piperazinecarboxylate (ester)
286456-34-6L-Tyrosine, 5-oxo-1-(3-pyridinylmethyl)-L-prolyl-,4-(2-pyridinyl)-1-piperazinecarboxylate (ester)