Using CC1(CCCC(=O)COC2C(=O)CCC3(C)C(=O)CCC23)OCCO1 to produce CC1(CCC2=C3CCC4(C)C(=O)CCC4C3OCC2=O)OCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.