Using CCOC(=O)C(C)(C)Oc1ccc(CCOc2cc(C)c(OC(C)=O)c(C)c2C)cc1 to produce Cc1cc(OCCc2ccc(OC(C)(C)C(=O)O)cc2)c(C)c(C)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.