cactinomycin

cac·ti·no·my·cin

(kak'ti-nō-mī'sin),
Produced by Streptomyces chrysomallus. A mixture of actinomycins C1 (dactinomycin), C2, and C3 used as an antineoplastic, immunosuppressive agent.
See also: actinomycins.
Synonym(s): actinomycin C