Table 11.
Furocoumarins and methoxycoumarins in the residual fraction of expressed lemon oil obtained from the fruit peels of Citrus limon (L.) Osbeck (based on the analysis of five batches)
| Congener | Average | Range |
|---|---|---|
| mg/kg | mg/kg | |
| Furocoumarins | ||
| Psoralen | 23.9 | 22.1–26.2 |
| 5‐Methoxypsoralen (bergapten) | 71.1 | 31.9–144 |
| Bergamottin (5‐geranoxypsoralen) | 3.0 | 3.0 |
| Oxypeucedanin | 2,825 | 2,061–4,183 |
| 8‐Methoxypsoralen (xanthotoxin) | 30.2 | 17–56.1 |
| 8‐Geranoxypsoralen | 649 | 425–1,361 |
| Imperatorin | 1,213 | 928–1,489 |
| 5,8‐Dimethoxypsoralen (isopimpinellin) | 113 | 108–119 |
| Phellopterin | 3.0 | 3.0 |
| Oxypeucedanin hydrate | 80 | 51.7–109 |
| Byakangelicol | 88 | 0.5–134 |
| Byakangelicin | < 0.1 | < 0.1 |
| Methoxycoumarins | ||
| Citropten (5,7‐dimethoxycoumarin)a | 690 | 220–970 |
| 5‐Geranyloxy‐7‐methoxycoumarin | < 0.1 | < 0.1 |
a
By GC‐MS.