Using CC1(C)OB(c2ccc(Oc3ccc(C=O)cc3)cc2COC2CCCCO2)OC1(C)C to produce O=Cc1ccc(Oc2ccc3c(c2)COB3O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.