| http://www.w3.org/ns/prov#value | - or an ester or a salt thereof (hereinafter also referred to as compound (I)), serves excellently as a cysteine protease inhibitor (e.g. ICE inhibitor), and a compound of the formula: ##STR10## wherein R1 is a hydrogen atom or an acyl group; R2, R3 and R4, same or different, are a bond, an amino acid residue or a group of the formula:
|
