Using O=C1CCC2(CC1)OCCO2, CCCCOc1cccc(F)c1F to produce CCCCOc1ccc(C2(O)CCC3(CC2)OCCO3)c(F)c1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.