Wiktionary
microviridin
n. (context organic compound English) A tricyclic depsipeptide isolated from the toxic cyanobacterium (taxlink Microcystis viridis species noshow=1)
Wikipedia
Microviridin
Microviridins are a class of serine protease inhibitors produced by various genera of cyanobacteria. Microviridins are characterized by tricyclic depsipeptide structure.
The known microviridins include microviridins A-L.