KOLOS, N. N.; CHECHINA, N. V. Synthesis of substituted pyrrolo[2,3-d]pyrimidines and pyrido[2,3-d]pyrimidines in the one-pot condensation of 2-thio-6-aminouracil, arylglyoxals and CH-acids. Kharkiv University Bulletin. Chemical Series, n. 32, p. 67-75, 14 Jun. 2019.