Using CC1CC(=O)NN=C1c1ccc2[nH]c(CCCCN3C(=O)c4ccccc4C3=O)nc2c1 to produce CC1CC(=O)NN=C1c1ccc2[nH]c(CCCCN)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.