Using CCOC(=O)CCN(CNC(=O)OC(C)(C)C)C(=O)Cn1cc(C)c(=O)[nH]c1=O to produce Cc1cn(CC(=O)N(CCC(=O)O)CNC(=O)OC(C)(C)C)c(=O)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.