Method for the production of a modified 8-amino acid cyclosporin derivative

摘要

A cyclosporin derivative with incorporated "8-(3-fluoro-D-alanine)" or "8-(2-deutero-3-fluoro-D-alanine)" has been isolated from the fermentation broth of incubating Tolypocladium inflatum MF5080 (NRRL 8044) with 3-fluoro-D-alanine or its 2-deuterated isomer respectively. The modified cyclosporins exhibit immunosuppressive properties.