Using COc1ccc(C(=O)N2CCC(N3C(=O)NCc4ccccc43)CC2)c(OC)c1, CI to produce COc1ccc(C(=O)N2CCC(N3C(=O)N(C)Cc4ccccc43)CC2)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.