Using COc1c2c(cc(C3CCCC3)c1C(O)c1ccc(C(F)(F)F)cc1)OC(C)(C)CC2=O to produce COc1c2c(cc(C3CCCC3)c1C(=O)c1ccc(C(F)(F)F)cc1)OC(C)(C)CC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.