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Dr. Duke's Phytochemical and Ethnobotanical Databases
U.S. Department of Agriculture
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Tyrosinase-Inhibitor

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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
CUMINALDEHYDE ID50=0.05 mM *
GLABRIDIN *
KAEMPFEROL ID50=230 uM *
P-COUMARIC-ACID ID50=3,650 uM *
P-HYDROXYBENZALDEHYDE ID50=1.2 mM *
P-HYDROXYBENZALDEHYDE ID50=1,200 uM *
P-HYDROXYBENZYL-ALCOHOL ID50=650 uM *
PROTOCATECHUIC-ACID ID60=0.5 uM/ml *
QUERCETIN ID50=70 uM *
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List of Activity Plants.
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Plant Name Common Name Chemical Count Total Parts Per Million
Taxus baccata Common Yew 4 2, 035
Telosma cordata Merrill flowers 1 1, 026
Terminalia catappa Indian Almond; Tropical Almond; Malabar Almond 2 0
Terminalia chebula Ink Nut; Myrobalan; Black Myrobalan; Chebulic Myrobalan 2 0
Terminalia ivorensis Idigbo; Emire; Blackbark; Black Afara; Brimstonewood; Satinwood; Shinglewood 1 0
Teucrium botrys Field Germander 1 0
Teucrium montanum Mountain Germander 1 0
Teucrium polium Golden Germander 1 0
Teucrium scordium Water Germander 1 0
Theobroma cacao Cacao 4 0
Thespesia populnea Indian tulip tree 2 700
Thevetia peruviana Peruvian Yellow Oleander; Luckynut; Yellow Oleander; Oleandre Jaune (Fr.); Thevetie (Ger.); Loandro-Amarelo (Port.); Adelfa Amarilla (Sp.); Cabalonga (Sp.); Chirca (Sp.) 2 0
Thymus capitatus 'Sicilian' Thyme; Spanish Origanum; Spanish Thyme 1 0
Thymus longicaulis Kekik; Tas Kekik 1 0
Thymus serpyllum Creeping Thyme 1 0
Thymus vulgaris Common Thyme; Garden Thyme; Thyme 4 1, 260
Tilia sp. Basswood; Lime; Linden 2 0
Tribulus terrestris Puncture-vine 2 0
Tridax procumbens Coatbuttons; Mexican daisy 1 0
Trifolium pratense Red Clover; Purple Clover; Peavine Clover; Cowgrass 4 192