Using O=C(O)CCc1cccc(-c2nc(=O)c3ccccc3s2)n1, CC(C)(C)OC(=O)CN to produce CC(C)(C)OC(=O)CNC(=O)CCc1cccc(-c2nc(=O)c3ccccc3s2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.