Huang, W. H., Lee, A. R., Lin, C. I., & Yen, M. H. (1993). Synthesis and Pharmacological Effects of Quinoxalinocarboxylic Acids. Journal of Medical Sciences, 13(4), 247-254. https://www.airitilibrary.com/Article/Detail?DocID=10114564-199302-201307030002-201307030002-247-254