Using O=C(c1ccccc1)n1c(=O)c(I)cn(CCCN2CC3CC3(c3ccc(Cl)cc3)C2)c1=O to produce O=c1[nH]c(=O)n(CCCN2CC3CC3(c3ccc(Cl)cc3)C2)cc1I, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.