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rhizoxin

n. An antimitotic agent with antitumor activity, isolated from a pathogenic plant fungus ((taxlink Rhizopus microsporus species noshow=1)) which causes rice seedling blight.

Wikipedia
Rhizoxin

Rhizoxin is an antimitotic agent with anti- tumor activity. It is isolated from a pathogenic plant fungus ( Rhizopus microsporus) which causes rice seedling blight.