Using C=Cc1cc2c(cc1C(F)(F)F)CN(C(=O)OC(C)(C)C)C2 to produce CCc1cc2c(cc1C(F)(F)F)CN(C(=O)OC(C)(C)C)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.