Using COc1cc(C)c(-c2cccc3cccc(-c4cc(C=O)c(OC)cc4C)c23)cc1C=O to produce Cc1cc(O)c(C=O)cc1-c1cccc2cccc(-c3cc(C=O)c(O)cc3C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.