H.-A. Yoon, H.-J. Nam, U.-I. Kim, K. Kim, and B. J. Kim, “Synthesis and Antiviral Activity of Some 1H-Pyrrolo[3,2-b]pyridin-6-yl)acetic Acid Derivatives”, ajc, vol. 29, no. 6, pp. 1199–1205, Apr. 2017.