Data Views Exclude Ubiquitous Chemicals Activities: 123 Chemicals w/Activities: 15 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 Petiole Seed Testa Low PPM High PPM StdDev *Reference 62 62 CAFFEINE Testa 38.0 52.0 -1.01 * 21 21 THEOBROMINE Petiole 30.0 32.0 -1.23 * *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.