Using O=C(NCCC1CCNCC1)C1=Cc2cnc3cccc(n23)S1, BrCCCc1ccccc1 to produce O=C(NCCC1CCN(CCCc2ccccc2)CC1)C1=Cc2cnc3cccc(n23)S1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.