Using CC(C(=O)NC1(c2ccccc2)CCC(=O)CC1)c1cc(C(F)(F)F)cc(C(F)(F)F)c1, [Li]CCCC to produce C=C1CCC(NC(=O)C(C)c2cc(C(F)(F)F)cc(C(F)(F)F)c2)(c2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.