Using CCOC(=O)CCc1ccc2c(c1)Cc1c-2[nH]c(=O)c2nc(C(=O)OCC)cn12 to produce O=C(O)CCc1ccc2c(c1)Cc1c-2[nH]c(=O)c2nc(C(=O)O)cn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.