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. 2020 Dec 15;11:580753. doi: 10.3389/fpls.2020.580753

Figure 1.

Figure 1

Simplified overview of phenolic pathways. The major subclasses of phenolics include the phenolic acid in blue and flavonoids in purple (including condensed tannins). Hydroxycinnamic acids, or HCAs, are comprised mostly of phenolic acids but could also include monolignols, coumarins, and other downstream compounds except the flavonoids and stilbenoids.