Using O=C([O-])[O-], CC(C)(C)OC(=O)N1CCC[C@@H]1COc1cc(O)cc2ncn(COC(=O)C(C)(C)C)c(=O)c12 to produce COc1cc(OC[C@H]2CCCN2C(=O)OC(C)(C)C)c2c(=O)n(COC(=O)C(C)(C)C)cnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.