Using COCOc1ccc(C2(C)COc3cc(OCOC)ccc3C2(O)c2cccc(O)c2)cc1 to produce COCOc1ccc(C2(C)COc3cc(OCOC)ccc3C2c2cccc(O)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.