Using O=C1NC(=O)c2ccccc21, CC(C)(C)OC(=O)NC(CO)C(C)(C)c1ccccc1 to produce CC(C)(C)OC(=O)NC(CN1C(=O)c2ccccc2C1=O)C(C)(C)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.