Using COC(=O)C(C)(C)CCNC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1O to produce CC(C)(CCNC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.