Using COC(=O)c1ccc(Oc2nccnc2C2=CN(C(=O)OC(C)(C)C)CCC2)cc1 to produce COC(=O)c1ccc(Oc2nccnc2C2CCCN(C(=O)OC(C)(C)C)C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.