Using CCOC(=O)c1cnn(-c2nc3cc(C(=O)OC)ccc3n2COCCOC)c1 to produce O=C(O)c1ccc2[nH]c(-n3cc(C(=O)O)cn3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.