Using Brc1nn2c(I)cnc2s1, COc1ncc(B2OC(C)(C)C(C)(C)O2)cc1N to produce COc1ncc(-c2nn3c(I)cnc3s2)cc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.