Data Views Plants (>= 1 Chemical): 72 All Chemicals: 61 CSV Excel PDF Previous1234 Show all rows. Paginate rows. Click on column headings to sort table by that column Chemical Dosage References YANGONIN --* *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.