ACE2 and COVID-19: Two in silico studies showed that quercetin, quercetin 3-glucuronide-7-glucoside, quercetin 3-vicianoside, absinthin, glabridin, and gallic acid gave better binding energy (BE) with ACE2 (Joshi et al., 2020) toward inhibiting COVID-19 (Joshi et al., 2020).