Using C=CCC(c1ccc(OCOC)cc1O)C(C)(CO)c1ccc(OCOC)cc1 to produce C=CCC1c2ccc(OCOC)cc2OCC1(C)c1ccc(OCOC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.