The chemical Tacrolimus has a designated molecular formula of C44H69NO12 and a molecular weight of 804.031 g/mol. Synonyms may include: CCRIS 7124, FK 506, FR 900506, Prograf, Tsukubaenolide, (-)-FK 506, Fujimycin, L 679934, Protopic, FK506, UNII-Y5L2157C4J, Avagraf (ChemID). Tacrolimus has been assigned a MeSH pharmacological action of: Calcineurin Inhibitor, Immunosuppresant.