Using COC(=O)C(C)(C)NCC(C)=O, O=C(O)Cc1ccsc1 to produce COC(=O)C(C)(C)N(CC(C)=O)C(=O)Cc1ccsc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.