Using CCCCCCCCCCCCO, O=C(O)C(C(=O)O)c1ccsc1 to produce CCCCCCCCCCCCOC(=O)C(C(=O)OCCCCCCCCCCCC)c1ccsc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.