Synthesis, DFT, and in silico biological evaluation of chalcone bearing pyrazoline ring against Helicobacter pylori receptors oleh Najla A. Alshaye, Nuha Salamah Alharbi, Mohamed A. El-Atawy, Reham O. El-Zawawy, Ezzat A. Hamed, Mohammed Elhag, Hoda A. Ahmed, Alaa Z. Omar