Using O=C(c1ccc(Oc2ncccc2C2=CCOCC2)cc1)c1nc2ccccc2[nH]1 to produce OC(c1ccc(Oc2ncccc2C2CCOCC2)cc1)c1nc2ccccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.