Using CNC, Cc1c(C(=O)CC(C)C)cc2cc(C(=O)O)oc2c1C to produce C=C(C(=O)c1cc2cc(C(=O)O)oc2c(C)c1C)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.