Using Cn1nccc1[C@@]1(O)CCCC[C@@H]1O, O=C(n1ccnc1)n1ccnc1 to produce Cn1nccc1[C@@]12CCCC[C@@H]1OC(=O)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.