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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.
Click on column headings to sort table by that column.
Plant Name Common Name Chemical Count Total Parts Per Million
Centaurea calcitrapa Star-Thistle 1 0
Centaurea cyanus Cornflower; Bachelor's Button 5 0
Centaurium erythraea Centaury 2 0
Centella asiatica Gotu Kola; Pennywort 2 0
Ceratonia siliqua Carob; St.John's-Bread; Locust Bean 2 0
Chimaphila umbellata King's Cure; Pipsissewa 2 302, 000
Chrysanthemum parthenium Feverfew 2 0
Chrysanthemum x morifolium Chrysanthemum; Florist's Chrysanthemum; Mum; Ju Hua (Pinyin) 3 0
Cichorium endivia Endive; Escarole 1 0
Cichorium intybus Chicory; Witloof; Succory 2 63
Cinchona pubescens Quinine; Red Cinchona; Red Peruvian-Bark; Redbark 1 0
Cinnamomum aromaticum Cassia; Cassia Bark; Cassia Lignea; Chinese Cassia; Chinese Cinnamon; China Junk Cassia; Saigon Cinnamon; Zimtcassie (Ger.); Canela de la China (Sp.); Canelero chino (Sp.); Chinazimt (Ger.); Chinesischer Zimtbaum (Ger.); Kashia-Keihi (Jap.); Canelle de Cochinchine (Fr.); Cannelier Casse (Fr.); Cannelier de Chine (Fr.) 5 657, 600
Cinnamomum camphora Camphor; Ho Leaf 4 0
Cinnamomum verum Cinnamon; Ceylon Cinnamon 5 6, 566, 910.799999237
Cistus ladaniferus Ambreine; Gum Cistus; Labdanum; Rockrose 2 31, 360
Citrullus colocynthis Colocynth 2 0
Citrullus lanatus Watermelon 1 0
Citrus aurantiifolia Lime 1 0
Citrus aurantium Petitgrain; Bitter Orange 4 0
Citrus limon Lemon 3 12, 702