Design, synthesis, in vitro and in silico studies of novel piperidine derived thiosemicarbazones as inhibitors of dihydrofolate reductase oleh Hina Aftab, Saeed Ullah, Ajmal Khan, Mariya al-Rashida, Talha Islam, Kholood A. Dahlous, Saikh Mohammad, Hamdy Kashtoh, Ahmed Al-Harrasi, Zahid Shafiq