| abstract |
To provide a compound having γ-glutamylcyclotransferase inhibitory activity, and a γ-glutamylcyclotransferase inhibitor and an anticancer agent containing the compound. The general formula (1): [wherein R1 represents an alkylene group having 2 to 5 carbon atoms, R2 and R3 are the same or different and represent α-amino acid side chains, and R4 and R5 are the same or A hydrogen atom or an alkyl group (the alkyl group may be substituted with an amino group, an alkylamino group, a dialkylamino group, a hydroxyl group, or an alkoxy group)] or a salt thereof, and A γ-glutamylcyclotransferase inhibitor and an anticancer agent containing the compound or a salt thereof. [Selection figure] None |