Using Brc1ccc(-c2ccccc2)cc1, Cc1cccc(CC(=O)c2ccccc2)c1 to produce O=C(Cc1ccccc1)c1ccc(-c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.