Using O=C(C1CCc2c(sc3ncnc(Nc4cccc(Br)c4)c23)C1)N1CCCCC1 to produce Brc1cccc(Nc2ncnc3sc4c(c23)CCC(CN2CCCCC2)C4)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.