Using Cc1c(C)c2c(c(C)c1OC(=O)C(C)C)C(=O)C(C)(C)O2, CC(C)(C)[O-] to produce C=C1c2c(C)c(OC(=O)C(C)C)c(C)c(C)c2OC1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.