Using O=C1Cc2ccc(Cl)cc2N1, CC(C)(C)OC(=O)OC(=O)[O-] to produce CC(C)(C)OC(=O)N1C(=O)Cc2ccc(Cl)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.