Using CCCCCCCCCCCCCCCC(=S)SC(CNC(=O)OC(C)(C)C)CNC(=O)OC(C)(C)C to produce CCCCCCCCCCCCCCCC(=S)SC(CN)CN, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.