Using CCOC(=O)COCCP(=O)(OCC)OCC, CCOC(COc1ccc(C=O)cc1)OCC to produce CCOC(=O)C(=Cc1ccc(OCC(OCC)OCC)cc1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.