Using CC(C)(C)OC(=O)NCCCO, COc1cccc(O)c1C(C)=O to produce COc1cccc(OCCCNC(=O)OC(C)(C)C)c1C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.