Using [Li]CCCC, COc1ccc(C2OCC(C)(C)[C@H](C=O)O2)cc1 to produce C=C[C@@H]1OC(c2ccc(OC)cc2)OCC1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.