Piscarinine
[image:Piscarinine A and B.svg|thumb|150px|2D Structure of Piscarinine A and Piscarinine B]
Piscarinines are bioactive alkaloid isolates of Penicillium piscarium NKM F-961 and Penicillium piscarium Westling that belong to a class of naturally occurring 2,5-diketopiperazines.
The cytotoxic dehydroproline tryptophan derivatives piscarinines A and B were shown to be active against the prostate cancer cell line LNCAP .