Using CCOC(=O)CCCCCCC(=O)OCC, CCOC(=O)c1cccnc1 to produce CCOC(=O)CCCCCC(C(=O)OCC)C(=O)c1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.