Using O=C(Nc1c[nH]c2nccc(N3CCN(Cc4ccccc4)CC3)c12)c1cccnc1 to produce O=C(Nc1c[nH]c2nccc(N3CCNCC3)c12)c1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.