Using CCCCCC1(CCC23CC(OC(=O)c4ccc(-c5ccccc5)cc4)CC2CC(=O)O3)OCCO1, O=C([O-])[O-] to produce CCCCCC1(CC[C@@H]2[C@H]3CC(=O)O[C@H]3C[C@H]2O)OCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.