Cyclic peptide compounds for pain treatment and their production process

摘要

This invention provides processes for producing novel cyclic peptide compounds, which comprise cultivating Ctenomyces serratus FERM BP-5731 and then isolating the cyclic peptide compounds from the fermentation broth. The compounds produced by these processes include a cyclic peptide compound of the following formula (I): <CHEM> The present invention also relates to a pharmaceutical composition comprising the same, which is useful in the treatment of severe pain, detoxication of narcotics dependency or acute narcotics intoxication or the like.