Using O=C1OC(=O)c2nccnc21, Nc1ccn2cc(-c3ccccc3)nc2n1 to produce O=C(O)c1nccnc1C(=O)Nc1ccn2cc(-c3ccccc3)nc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.