Using Nc1nncs1, CC(O)C(NC(=O)OC(C)(C)C)C(=O)O to produce CC(O)C(NC(=O)OC(C)(C)C)C(=O)Nc1nncs1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.