Using O=c1ccc2cc(C=CCCN3CCN(c4ccccc4)CC3)ccc2[nH]1 to produce O=c1ccc2cc(CCCCN3CCN(c4ccccc4)CC3)ccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.