Using O=C(O)CN1C(=O)c2ccccc2C1=O, CC(C)(C)OC(=O)N1C2CCC1CNC2 to produce CC(C)(C)OC(=O)N1C2CCC1CN(C(=O)CN1C(=O)c3ccccc3C1=O)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.