Using CCn1c2ccccc2c2cc(NC(=O)CCCN(C)C)ccc21, CI to produce CCn1c2ccccc2c2cc(N(C)C(=O)CCCN(C)C)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.