Bogdan, N. M., Bogza, S. L., & Nikolyukin, Y. A. (2020). Acylation of indolyl subsituted β-ketonitriles. The way to new indolo[2,3-c]pyrilium and β-carboline derivatives. Journal of Organic and Pharmaceutical Chemistry, 18(4(72), 23–27. https://doi.org/10.24959/ophcj.20.206021