Using Cc1nc(N)c(CCC2CCN(C(=O)[C@H](C)NC(=O)OC(C)(C)C)CC2)c(Cl)n1 to produce Cc1nc(N)c(CCC2CCN(C(=O)[C@H](C)N)CC2)c(Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.