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