Using COC(=O)c1cc(OC)c(OCc2ccccc2)c(C23CC4CC(CC(C4)C2)C3)c1 to produce COc1cc(C(=O)O)cc(C23CC4CC(CC(C4)C2)C3)c1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.