Using COCOc1cc(O)cc(C)c1C=O, OB(O)c1cccc(OCc2ccccc2)c1 to produce COCOc1cc(Oc2cccc(OCc3ccccc3)c2)cc(C)c1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.