Using O=Cc1ccc(N2CCC3(CC2)OCCO3)cc1, CCOC(=O)CC(=O)OCC to produce CCOC(=O)C(=Cc1ccc(N2CCC3(CC2)OCCO3)cc1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.