Using Brc1ccc2c(c1)nc(-c1ccccc1)n2-c1ccccc1, OB(O)c1ccc(Cl)cc1 to produce Clc1ccc(-c2ccc3c(c2)nc(-c2ccccc2)n3-c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.