Data Views Exclude Ubiquitous Chemicals All Chemicals: 1 CSV Excel PDF Click on column headings to sort table by that column # Activity Chemical Part All Leaf Low PPM High PPM StdDev *Reference 0 TROPACOCAINE Leaf -- 20.0 -1.14 Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. *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.