Using Cc1cccc(-c2ccc3c(c2)c(C(=O)C(=O)O)cn3Cc2ccc(C(C)(C)C)cc2)c1 to produce Cc1cccc(-c2ccc3c(c2)c(CC(=O)O)cn3Cc2ccc(C(C)(C)C)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.