Prior to performing the docking studies the multiple sequence alignment was carried out for the spike proteins of the novel corona virus, SARS-CoV-2 and the 2002 SARS-CoV (Supplementary Figure 1 and Table 1). These results show that there is a very high percentage identity (greater than 99%) among the spike protein of the novel corona virus SARS-CoV-2 strains. There was around 74% identity of the SARS-CoV-2 spike proteins with the 2002 SARS-CoV. Therefore, the SARS-CoV-2 spike protein is very much closer to SARS-CoV than to the other corona viruses as shown in other studies (Ahmed et al., 2020).