polyphenol compound content A phenolic compound content ( TO:0020076) which involves polyphenols. TO:0001172 2025-09-15T22:44:44Z https://orcid.org/0000-0002-6379-8932 plant_trait_ontology Polyphenols are characterized by their chemical structure, which consists of multiple phenol rings (C6H6O) linked together. Polyphenols include flavonoids phenolic acids (e.g., caffeic acid, ferulic acid), stilbenes (e.g., resveratrol) and lignans. phenolic compound content