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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 |
|---|---|---|---|
| Ocimum suave | Kenyan Tree Basil | 2 | 5, 720 |
| Ocimum tenuiflorum | Anise-Scented Basil | 4 | 12, 310 |
| Oenanthe javanica | Javan Water Dropwort | 2 | 0 |
| Oenothera biennis | Evening-Primrose | 5 | 18, 728 |
| Olea europaea | Olive | 3 | 13 |
| Ophiopogon japonicus | Mai-Men-Dong; Mai-Men-Tung | 1 | 0 |
| Opopanax chironium | Hercules All Heal; Opopanax | 1 | 0 |
| Opuntia ficus-indica | Indian Fig; Prickly Pear; Nopal; Nopalito | 2 | 2, 728, 260 |
| Origanum creticum | Dittany Of Crete | 1 | 0 |
| Origanum majorana | Marjoram; Sweet Marjoram | 5 | 2, 819, 920 |
| Origanum minutiflorum | Small-Flowered Oregano | 2 | 20, 250 |
| Origanum onites | Oregano; Pot Marjoram | 2 | 78, 300 |
| Origanum sipyleum | Bayircayi; Guveyoto | 1 | 8, 236 |
| Origanum syriacum | Za'Atar | 1 | 73, 465 |
| Origanum vulgare | Greek Oregano; Wild Oregano; Common Turkish Oregano | 6 | 7, 190, 893 |
| Oryza sativa | Rice | 2 | 0 |
| Pachira aquatica | Provision Tree | 1 | 0 |
| Paeonia lactiflora | Chih-Shao; Peony; Common Garden Peony; White Peony; Bai Shao (Chinese) | 1 | 0 |
| Paeonia moutan | Moutan; Tree Peony | 1 | 0 |
| Paeonia suffruticosa | Moutan; Tree Peony; Moutan Peony | 1 | 0 |