Using O=C(O)CO, Nc1ncnc2c1c(-c1ccc(Oc3ccccc3)cc1)nn2[C@@H]1CCCNC1 to produce Nc1ncnc2c1c(-c1ccc(Oc3ccccc3)cc1)nn2[C@@H]1CCCN(C(=O)CO)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.