Using CC(=O)c1cccc(CN(Cc2ccc(C(C)(C)C)cc2)C2CC2)c1, [Li]CCCC to produce C=C(C)c1cccc(CN(Cc2ccc(C(C)(C)C)cc2)C2CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.