Using CCOC(C)=O, COc1ccc2c(c1)Oc1ccccc1C(=O)C2 to produce CCOC(=O)CC1(O)Cc2ccc(OC)cc2Oc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.