Using COCc1nc(NC(=O)N[C@H](C)c2ccccc2)cc2[nH]nc(N)c12, CC(=O)Cl to produce COCc1nc(NC(=O)N[C@H](C)c2ccccc2)cc2[nH]nc(NC(C)=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.