Using CC1=C(C(=O)O)N2C(=O)C(N)C2SC1, CC(C)(C)OC(=O)OC(C)(C)C to produce CC1=C(C(=O)O)N2C(=O)C(NC(=O)OC(C)(C)C)C2SC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.