Using COc1cccc(C(=O)C2C3CC4CC(C3)CC2C4)c1, CC(C)(C)[O-] to produce COc1cccc(C=C2C3CC4CC(C3)CC2(OC)C4)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.