Using COC(=O)C=Cc1cccc(-c2nc3cc(-c4ccccc4)ccc3o2)c1 to produce O=C(O)C=Cc1cccc(-c2nc3cc(-c4ccccc4)ccc3o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.