After the recent coronavirus disease 2019 (COVID-19) outbreak, in silico screening methods and molecular docking studies have indicated that the parent compounds of KKC may have antiviral effects against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by blocking the host cell receptor angiotensin converting enzyme 2 (ACE2) or inhibiting the key viral protease necessary for its replication in the host cell (Kiran et al., 2020). The gene discussed is ACE2; the disease is COVID-19.