ChemInform Abstract: Preparation of Dihydrotetrazolo[1, 5‐a]pyrimidine Derivatives from Biginelli 3, 4‐Dihydropyrimidine‐2‐thiones. Issue 14 (April 2015) - Hashim, Jamshed; Arshad, Nuzhat; Khan, Ijaz; Nisar, Sonia; Ali, Basharat; Iqbal Choudhary, M.