streptonigrin

noun
strep·​to·​ni·​grin | \-ˈnī-grən \

Medical Definition of streptonigrin 

: a toxic antibiotic C25H22N4O8 from an actinomycete of the genus Streptomyces (S. flocculus) that interferes with DNA metabolism and is used as an antineoplastic agent

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