The chemical Ascomycin has a known molecular formula of C43-H69-N-O12. Synonyms may include: Immunomycin, FR 900520, FR 520, FK 520, L 683590, L 683,590, L-683590, NSC 106410, UNII-AUF4U5NSJK (ChemID). Ascomycin has been assigned a MeSH pharmacological action of: Antibacterial, Immunosuppresant.