Figure 1. General structures of flavonoids.[Citation2]
![Figure 1. General structures of flavonoids.[Citation2]](/cms/asset/95b5e20d-60a2-4913-a357-88c48044ffdf/ljfp_a_1220393_f0001_b.gif)
Figure 2. General structural formulae of phenolic acids.[Citation2]
![Figure 2. General structural formulae of phenolic acids.[Citation2]](/cms/asset/3ea190cf-db20-46e4-91a5-d183d5a203aa/ljfp_a_1220393_f0002_b.gif)
Figure 3. Most common derivatives of flavonoids with basic structures.[Citation9]
![Figure 3. Most common derivatives of flavonoids with basic structures.[Citation9]](/cms/asset/d62fdb5f-016c-4c80-b42c-dee4fb6fcbd3/ljfp_a_1220393_f0003_b.gif)
Figure 4. Chemical structures of some phenolic compounds commonly found in fruits and coffee.[Citation3]
![Figure 4. Chemical structures of some phenolic compounds commonly found in fruits and coffee.[Citation3]](/cms/asset/1eddd48c-686d-4f86-81be-495c730a516b/ljfp_a_1220393_f0004_b.gif)
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