Using O=C=O, COc1c(Br)ccc2[nH]nc(-c3cccc(F)c3)c12 to produce COc1c(C(=O)O)ccc2[nH]nc(-c3cccc(F)c3)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.