Using CCCCCCCCCCCCCCCCCC(O)c1ccc(O)c(C(=O)O)c1 to produce CCCCCCCCCCCCCCCCC=Cc1ccc(O)c(C(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.