Yakovenko, G. G., & Vovk, M. V. (2021). Convenient approaches to the synthesis of 6-amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines. Journal of Organic and Pharmaceutical Chemistry, 19(1(73), 10–15. https://doi.org/10.24959/ophcj.21.224583