Using CC(C)(C)OC(=O)NC1CN(C(=O)C(C)(C)C)c2ccccc2N(CC(=O)C(C)(C)C)C1=O to produce CC(C)(C)C(=O)CN1C(=O)C(N)CN(C(=O)C(C)(C)C)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.