| abstract |
(57) [Summary] [Structure] A novel cyclic peptide compound selected from the group consisting of the following general formula (I) or formula (II) or a salt thereof, or a method for producing the same. [Chemical 1] (Each symbol in the formulas has the following meanings: R 1 : benzylcarbonyl group or isovaleryl group R 2 , R 3 : each hydroxyl group, or carbonyl oxygen together.) [Effect] It is useful as a drug, especially as an elastase inhibitor, for emphysema, etc. |