Using COC(=O)c1cc(N2CCOCC2)cc2c1nc(C(F)F)n2Cc1cccc2ccccc12 to produce O=C(O)c1cc(N2CCOCC2)cc2c1nc(C(F)F)n2Cc1cccc2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.