Dideoxyverticillin A (11,11’-dideoxyverticillin A) is a complex epipolythiodioxo-piperazine isolated from a marine fungus (Bionectriaceae).
Piperazine-containing buffers (PIPES, HEPES, POPSO and EPPS) can form radicals and should be avoided in studies of redox processes in biochemistry.
meta-Chlorophenylpiperazine (mCPP) – a recreational drug and stimulant of the piperazine class