Table 3. Relationship among chemical constituents, efficacy and distribution of Sweet wormwood herb.
| Efficacy | Chemical constituents | Distribution | |||||
|---|---|---|---|---|---|---|---|
| Chemical type |
percentages (%) |
PC1 (%) |
PC2 (%) |
Distribution | Topography (m) |
Climate | |
| mainly preventing malaria |
QHS type | Artemisinin (>80) arteannuin B (<15) | >50 | <50 | South 31°N | <2000 | Subtropical zone |
| resolve summerheat-heat or preventing malaria | INT type | Artemisinin (50–80) arteannuin B (15–50) |
20–50 | 50–80 | North 31°N, West China |
500–200 | Temperate zones |
| mainly resolve summerheat-heat |
QHYS type | Artemisinin (<50) arteannuin B (40–60) |
0–20 | 80–100 | North 31°N, East China |
<500 | Temperate zones |