Using O=C(c1cnccc1Oc1cc(Cl)c(Br)cc1Cl)N1CCN(C2CC2)c2ccccc21, CC(C)OB(OC(C)C)OC(C)C to produce O=C(c1cnccc1Oc1cc(Cl)c(O)cc1Cl)N1CCN(C2CC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.