Using CCCCOc1ccc(C=O)cc1, CC12CCC(CC1=O)C2(C)C to produce CCCCOc1ccc(C=C2C(=O)C3(C)CCC2C3(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.