Using CCCCCCC1(CCCCCC)c2ccccc2-c2cc3c4ccccc4n(CC)c3cc21, CC(=O)Cl to produce CCCCCCC1(CCCCCC)c2ccccc2-c2cc3c4cc(C(C)=O)ccc4n(CC)c3cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.