Using O=c1cc(NCCC2CC=CCN2Cc2ccc(Cl)c(Cl)c2)[nH]c2ccccc12 to produce O=c1cc(NCCC2CCCCN2Cc2ccc(Cl)c(Cl)c2)[nH]c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.