Using NC1CCOCC1, COC(=O)c1ccc(OCc2c(-c3ccc(F)c(F)c3)noc2CO)nc1 to produce O=C(NC1CCOCC1)c1ccc(OCc2c(-c3ccc(F)c(F)c3)noc2CO)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.