Using O=C1c2ccccc2C(=O)N1O, CC(C)(C)OC(=O)N1CC(O)CN1C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1CC(ON2C(=O)c3ccccc3C2=O)CN1C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.