Using COc1ccc(CNc2nc(N3CCOCC3)cc(-n3c(C(F)F)nc4ccccc43)n2)cc1OC to produce Nc1nc(N2CCOCC2)cc(-n2c(C(F)F)nc3ccccc32)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.