Using COC(=O)C(=Cc1ccc(OCCOc2ccc3c(c2)C(C)(C)CCC3(C)C)cc1)C(=O)OC to produce COC(=O)C(Cc1ccc(OCCOc2ccc3c(c2)C(C)(C)CCC3(C)C)cc1)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.