The chemical Tanshinone I has a designated molecular formula of C18H12O3 and a molecular weight of 276.291 g/mol. Synonyms may include: Tanshinone, Tanshinone A, Tanshinon I, UNII-03UUH3J385 (ChemID). Tanshinone I has been assigned a MeSH pharmacological action of: Antineoplastic, Immunosuppresant.