Another phenolic constituent is tea,theogallin,accounts for approximately 1 percent of the dry weight of the leaf. Chlorogenic acid,also a phenolic compound,is a minor constituent in tea.

• 茶叶中另一酚类组分是3-邻-没食子酰奎尼酸，它约占茶叶干重的1%25。同属酚类化合物的绿原酸在茶叶中是次要成分。