Discovery of potent inhibitors for M pro enzyme of SARS-COV2 by multi-stage in-silico screening of Alkannin/shikonin - Nitish Kumar; Jatinder Vir Singh; Kavita Bhagat; Harmandeep Kaur Gulati; Anchal Sharma; Archana Rani; Amit Duggal; Puja Gulati; Harbinder Singh; Preet Mohinder Singh Bedi; Sarabjit Kaur (Natural Product Research, 2022)