摘要:
Substance FA-70D which has the following formula (1) or its salt, a method for its production, a pharmaceutical composition comprising the compound as an active ingredient, a method of treating osteoporosis which comprises administering the compound, use of the compound as a drug, and a microorganism capable of producing Substance FA-70D.
This compound has specific inhibitory activity against cathepsin series proteases and is of value as a therapeutic drug for various diseases with which these enzymes are associated, particularly osteoporosis.