even death. polyphenol , also known as phenolics, contain  phenol  rings. The  anthocyanins  that give grapes their purple color, the  isoflavones , the phytoestrogens  from  soy  and the  tannins  that give tea its astringency are phenolics. Terpenoids are built up from  terpene  building blocks. Each terpene consists of two paired  isoprenes