Piperazin-2-yl

2-[3-[5-[(4-hydroxyphenyl)methyl]-3,6-dioxo-piperazin-2-yl]propyl]guanidine

methyl 2-(5-methyl-3-oxopiperazin-2-yl)acetate

5-((2S)PIPERAZIN-2-YL)-2-(TRIFLUOROMETHYL)THIOPHEN