Using CC(=O)OC(C)=O, Cc1c(C(=O)O)c2cc(O)ccc2n1C(C)C to produce CC(=O)Oc1ccc2c(c1)c(C(=O)O)c(C)n2C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.