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. 2021 Oct 6;13:729949. doi: 10.3389/fnagi.2021.729949

Figure 6.

Figure 6

Chemical structure of important flavonoids of sorghum with anti-AD activities. (A) Anthocyanidins (a: R1= R2 = OCH3: malvidin, R1 = OH, R2 = H: cyanidin, R1=OCH3, R2 = H: peonidin, b: R1 = H, R2 = H, R3= H: apigeninidin, R1 = H, R2 = Glc, R3= H: apigeninidin-5-glucoside, R1 = H, R2 = H, R3=CH3: 7- methoxyapigenindin, R1 = OH, R2 = H, R3= H: luteolinidin, R1 = OH, R2 = Glc, R3= H: luteolinidin-5-glucoside, R1 = OH, R2=CH3, R3= H: 5-methoxyluteolinidin), (B) others (a: apigenin b: luteolin c: naringenin d: kaempferol e: quercetin f: taxifolin g: catechin; Awika et al., 2005; Lakey-Beitia et al., 2015; Vanamala et al., 2017; Jabir et al., 2018).