Using COc1cccc(C2COc3c(C)c(C)c(NC(=O)CC(C)(C)C)c(C)c32)c1, CC(=O)Cl to produce COc1cc(C2COc3c(C)c(C)c(NC(=O)CC(C)(C)C)c(C)c32)ccc1C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.