Data Views Exclude Ubiquitous Chemicals Activities: 123 Chemicals w/Activities: 16 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 Bulb Flower Plant Low PPM High PPM StdDev *Reference 2 2 PHENYLACETIC-ACID Flower -- -- * 2 2 PIPERONAL Flower -- -- * 1 1 TIGOGENIN Bulb -- -- * *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.