Using CCOC(=O)Cn1ccc(NC(=O)OCc2ccc3c(c2)OCO3)nc1=O to produce O=C(O)Cn1ccc(NC(=O)OCc2ccc3c(c2)OCO3)nc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.