Using CCOC(=O)c1c(C)nc2c(O)cccn12, OCc1ncccc1F to produce CCOC(=O)c1c(C)nc2c(OCc3ncccc3F)cccn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.