Using CC(C)(C)NCCO, O=C(O)c1cccc2cc(-c3ccccc3)oc12 to produce CC(C)(C)NCCOC(=O)c1cccc2cc(-c3ccccc3)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.