Using CCCCOC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1SC(=O)N(C)C to produce COC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1S, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.