Using COC(=O)Cn1c(=O)c(=O)[nH]c2cc(C(F)(F)F)c(-n3cccc3)cc21 to produce O=C(O)Cn1c(=O)c(=O)[nH]c2cc(C(F)(F)F)c(-n3cccc3)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.