Data Views Exclude Ubiquitous Chemicals Activities: 742 Chemicals w/Activities: 202 CSV Excel PDF All Chemicals: 404 Previous1..234567891011 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Essential Oil Fruit Fruit Essent. Oil Leaf Leaf Essent. Oil Plant Resin, Exudate, Sap Root Seed Seed Essent. Oil Seed Oil Shoot Stem Low PPM High PPM StdDev *Reference 10 10 PIPERIDINE Seed -- -- * 2 2 HEXANOIC-ACID Fruit -- -- * *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.