Using COC(=O)c1ccc2c(O)c(C(=O)NCC(=O)OCc3ccccc3)c(=O)n(C)c2c1 to produce Cn1c(=O)c(C(=O)NCC(=O)O)c(O)c2ccc(C(=O)O)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.