Using O=C([O-])O, CCOC(=O)C1(NC(=O)OC(C)(C)C)C=C(Cl)C=CN1 to produce CC(C)(C)OC(=O)Nc1cc(Cl)cc(CO)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.