Using O=C(O)CCc1ccc(B(O)O)cc1, CCn1c(-c2nc(Br)cnc2N)nc2cnccc21 to produce CCn1c(-c2nc(-c3ccc(CCC(=O)O)cc3)cnc2N)nc2cnccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.