Using CCCCCCCCCCCCCCCCNc1csc(C(=O)NCC(=O)OCC)c1 to produce CCCCCCCCCCCCCCCCNc1csc(C(=O)NCC(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.