Figure 9. Molecular docking diagram showed that the binding capability of emodin against COVID-19 was presented as 3D diagrams and 2D diagrams, respectively. (A) Angiotensin converting enzyme 2 (ACE2), (B) 3CL. (C) Prostaglandin endoperoxide synthase 2 (PTGS2). (D) Colony stimulating factor 2 (CSF). (E) Epidermal growth factor receptor (EGFR). (F) Tumor protein 53 (TP53).