[1]
S. Kaping, P. Helissey, and J. N. Vishwakarma, “A three step one-pot regioselective synthesis of highly substituted pyrazolo[1,5-a]pyrimidines assisted by KHSO4 in aqueous media under ultrasound irradiation”, Eur. J. Chem., vol. 11, no. 3, pp. 179–186, Sep. 2020.