Using NC(CCCC(=O)O)Cc1ccccc1, CC(C)(C)OC(=O)N=[N+]=[N-] to produce CC(C)(C)OC(=O)NC(CCCC(=O)O)Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.