Using CC(C)(C)OC(=O)NCCO, COC(=O)c1cccc(OC)c1O to produce COC(=O)c1cccc(OC)c1OCCNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.