Using CCOC(=O)CN1C(=O)CCc2cc(Nc3nc(NC4CCC4)c4cc[nH]c4n3)ccc21 to produce O=C(O)CN1C(=O)CCc2cc(Nc3nc(NC4CCC4)c4cc[nH]c4n3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.