Chem. Heterocycl. Compd. 2018, 53 (11), 1242-1247
DOI: 10.1016/j.tetlet.2016.01.094
Hrynyshyn Y.; Tsizorik N.; Musiychuk A.; Bol’but A.; Vovk M.
4-Chloropyrazolo[1,5-а]pyrazines reacted with anthranilic acids forming 8Н-pyrazolo[5',1':3,4]pyrazino[2,1-b]quinazolin-8-ones representing a new heterocyclic system.