Using Nc1nc(-c2ccco2)c(-c2ccnc(F)c2)c(-c2ccco2)n1, OCCO to produce Nc1nc(-c2ccco2)c(-c2ccnc(OCCO)c2)c(-c2ccco2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.