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Dr. Duke's Phytochemical and Ethnobotanical Databases
U.S. Department of Agriculture
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Antioxidant

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List of activity chemicals.
Click on column headings to sort table by that column. *Unless otherwise noted all references are to (Duke, 1992)
Chemical Name Dosage Reference
PROTOCATECHUIC-ACID 2/3 quercetin *
PROTOCATECHUIC-ACID 1/2 BHT *
PROTOCATECHUIC-ACID 10 x alpha-tocopherol *
PROTOPAPAVERINE IC50=61 uM *
PRUNUSOL *
PTEROSTILBENE *
PUERARIN *
PUNICACORTEIN *
PUNICALAGIN IC50=2.3 uM *
PURPUROGALLIN Merck 11th Edition
PYCNOGENOL *
PYROCATECHOL Jim Duke's personal files.
PYROGALLOL Jim Duke's personal files.
QUERCETAGENIN-7-O-GLUCOSIDE *
QUERCETAGETIN Nigg, H.N. and Seigler, D.S., eds. 1992. Phytochemical Resources for Medicine and Agriculture. Plenum Press, New York. 445 pp.
QUERCETIN ED50=2.3 uM Seidel, V., Verholle, M., Malard, Y., Tillequin, F., Fruchart, J-C., Duriez, P., Bailleul, F., Teissier, E. 2000. Phenylpropanoids from Ballota nigra L. Inhibit in vitro LDL Peroxidation. Phytotherapy Research, 14(2): 93-98.
QUERCETIN 4.7 x Vit. E *
QUERCETIN IC47=10 uM *
QUERCETIN IC96=300 ppm Phenolic Compounds in Food and Their Effects on Health. Antioxidants & Cancer Prevention. Huang, M.T., Ho, C.T. and Lee, C.Y. eds. 1992. ACS Symposium Series 507.ACS, Washington 402 pp.
QUERCETIN-3,4'-DIGLUCOSIDE *
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List of Activity Plants.
Click on column headings to sort table by that column.
Plant Name Common Name Chemical Count Total Parts Per Million
Coptis chinensis Chinese Goldthread; Huang-Lian; Huang-Lien 2 1, 194
Coptis japonica Huang-Lia; Huang-Lian; Huang-Lien; Japanese Goldthread 2 1, 592
Coptis spp Generic Goldthread 2 398
Corchorus olitorius Jew's Mallow; Mulukiya; Nalta Jute 9 213, 417
Coriandrum sativum Coriander; Chinese Parsley; Cilantro 38 722, 355.600000076
Coriaria myrtifolia Mealy Tree 6 400, 000
Coriaria thymifolia Ground Toot; Shanshi 3 0
Coridothymus capitatus Spanish Oregano 7 19, 249
Cornus florida American Dogwood 5 60, 000
Cornus mas Cornelian Cherry; Sorbet 6 0
Cornus officinalis Chinese Dogwood 5 11
Corydalis spp Fumewort 2 0
Corylus americana American Filbert; American Hazel 4 0
Corylus avellana English Filbert; European Filbert; European Hazel; Hazel; Cobnut 18 649, 534.4000004977
Costus speciosus Crepe Ginger; Wild Ginger; Cane Reed 2 0
Crataegus cuneata Hawthorn 4 12
Crataegus laevigata Hawthorn; English Hawthorn; Whitethorn; Woodland Hawthorn 32 343, 573.59999990463
Crataegus monogyna Hawthorn; English Hawthorn 23 144, 160
Crataegus pentagyna Hawthorn 3 0
Crataegus rhipidophylla Hawthorn 28 75, 924.40000009537