Using COC(=O)c1sc(-c2ccccc2)cc1N(C(=O)C1CCC(=O)CC1)C(C)C, [Li]CCCC to produce C=C1CCC(C(=O)N(c2cc(-c3ccccc3)sc2C(=O)OC)C(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.