Using CCOC(=O)c1sc(N2CCOCC2)nc1CBr, OB(O)c1ccc2c(c1)OCCO2 to produce CCOC(=O)c1sc(N2CCOCC2)nc1Cc1ccc2c(c1)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.