Using CC1(C)CCC(C)(C)c2cc(C(=O)COc3ccc(C=O)c(O)c3)ccc21 to produce Cc1ccc(OCC(=O)c2ccc3c(c2)C(C)(C)CCC3(C)C)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.