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| Chemical Name | Dosage | Reference |
|---|---|---|
| SENKYUNOLIDE-N | 250 pg/ml | Duke, 1992 * |
| TRYPTOPHAN | 250 pg/ml | Duke, 1992 * |
| UMBELLIFERONE | not available | Duke, 1992 * |
| URUSHIOL | not available | Duke, 1992 * |
| XANTHOXYLIN | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Cinchona spp | Quinine | 2 | 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.) | 2 | 24, 800 |
| Cinnamomum camphora | Camphor; Ho Leaf | 3 | 0 |
| Cinnamomum sieboldii | Japanese Cinnamon | 1 | 0 |
| Cinnamomum verum | Cinnamon; Ceylon Cinnamon | 4 | 5, 597, 512 |
| Cistus ladaniferus | Ambreine; Gum Cistus; Labdanum; Rockrose | 1 | 8, 400 |
| Citrullus colocynthis | Colocynth | 2 | 0 |
| Citrullus lanatus | Watermelon | 3 | 835 |
| Citrus aurantiifolia | Lime | 1 | 255 |
| Citrus aurantium | Petitgrain; Bitter Orange | 2 | 5, 000 |
| Citrus limon | Lemon | 6 | 68, 920 |
| Citrus medica | Citron | 1 | 0 |
| Citrus paradisi | Grapefruit | 6 | 401 |
| Citrus reticulata | Mandarin; Tangerine | 4 | 96, 568 |
| Citrus sinensis | Orange | 6 | 64, 510 |
| Citrus spp | Citrus | 1 | 0 |
| Clematis vitalba | Traveler's Joy | 2 | 0 |
| Cnicus benedictus | Blessed Thistle | 3 | 243 |
| Cnidium officinale | Jih-Chiung | 3 | 0 |
| Coccinia grandis | Ivy Gourd; Kundree; Tindora; Tindori; Pepasan; Little Gourd; Kanduri | 3 | 0 |