Using CCOCOc1ccc(CCCc2ccc(C(=O)OC)c(C(=O)OC)c2)cc1CC to produce CCc1cc(CCCc2ccc(C(=O)OC)c(C(=O)OC)c2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.