Using O=C(O)c1ccccc1, CC(C)(C)OC(=O)N1CCCC(N)C1 to produce CC(C)(C)OC(=O)N1CCCC(NC(=O)c2ccccc2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.