Data Views Exclude Ubiquitous Chemicals Activities: 120 Chemicals w/Activities: 9 All Chemicals: 23 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Bark Plant Low PPM High PPM StdDev *Reference 7 7 SUCCINIC-ACID Plant -- -- * 0 SUMATROL Plant -- -- * 35 35 TANNIN Plant -- -- * *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.