Using Brc1ccnc2c1ccc1c(-c3ccccc3)ccnc12, C=CCCc1ccc(B(O)O)cc1 to produce C=CCCc1ccc(-c2ccnc3c2ccc2c(-c4ccccc4)ccnc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.