Using COCn1ccnc1, CC(C)(C)c1ccccc1C(=O)c1ccccc1 to produce COCn1ccnc1C(O)(c1ccccc1)c1ccccc1C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.