Using O=CC12CCC(c3cccc(Oc4ccccc4)c3)(CC1)CO2, [Li]CCCC to produce C=CC12CCC(c3cccc(Oc4ccccc4)c3)(CC1)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.