Data Views Exclude Ubiquitous Chemicals Activities: 197 Chemicals w/Activities: 13 All Chemicals: 22 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Flower Leaf Plant Root Stem Low PPM High PPM StdDev *Reference 35 35 TANNIN Leaf -- 120000.0 0.12 * 18 18 VITEXIN Leaf -- -- * *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.