Using CCOC(=O)C1=C(Nc2ccc(O)cc2C)OCC1=O, COCCO to produce CCOC(=O)C1=C(Nc2ccc(OCCOC)cc2C)OCC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.