. 2021 Nov 30;12:768268. doi: 10.3389/fphar.2021.768268
Copyright © 2021 Antão, Bangay, Domínguez-Martín, Díaz-Lanza and Ríjo.
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FIGURE 4.
The double bond between C2 and C3 makes it possible to distinguish flavones from flavanones.