ChemInform Abstract: Five‐Membered 2, 3‐Dioxoheterocycles. Part 94. Recyclization of 4, 5‐Diaroyl‐1H‐pyrrole‐2, 3‐diones under the Action of 3‐Aminopyrazolo[3, 4‐b]pyridine. Crystal and Molecular Structure of Substituted Pyrido[2′, 3′:3, 4]pyrazolo[1, 5‐a]pyrimidine. Issue 9 (4th March 2014) - Silaichev, P. S.; Slepukhin, P. A.; Maslivets, A. N.