Molecular formula: C43H69NO12

Molecular weight: 792.01

Appearance: white powder

Ascomycin (FK-520) is a twenty-three-carbon macrolides compound, which is the ethyl Chemicalbook analogue of the immunosuppressant Tacrolimus (FK-506).  In 1962 by the Japanese Fujisawa pharmaceutical companies (Fujisawa) from containing water (StreptomyceshygroscopicusNo. KK317) of Streptomyces isolated from soil.

Ascomycin (FK-520) is a twenty-three-carbon macrolides compound, which is the ethyl Chemicalbook analogue of the immunosuppressant Tacrolimus (FK-506). It is isolated from soil which contain Streptomyceshygroscopicus (No. KK317) by the Japanese company,Fujisawa, in 1962.