FIGURE 2.

(a) Chemical structure of some chalcone‐based compounds with anti‐influenza (compounds 1–4) (Dao et al., 2011; Malbari et al., 2018; Nguyen et al., 2010; Park et al., 2011), anti‐HSV (compounds 5 and 6) (Brandão et al., 2010; Phrutivorapongkul et al., 2003), anti‐HCV (compounds 7 and 8) (Adianti et al., 2014), anti‐HIV (compounds 9–12) (Cole et al., 2016; Hameed et al., 2016; Sharma et al., 2011; Wu et al., 2003), and anti‐ZIKV activities (compounds 13–15) (Mottin et al., 2022); (b) Structural similarity of some chalcone‐based compounds (16, 18, and 20) and corresponding anti‐SARS‐CoV/SARS‐CoV‐2 flavonoids (compounds 17, 19, and 21) (Liu et al., 2021)