Table 1 Contents of chemical markers (syringin, asperuloside, caffeine, epigallocatechin gallate, andrographolide and dehydroandrographolide) in formula extract
| Chemical markers | Content in formula extract (%) |
|---|---|
| Syringin | 0.043 ± 0.005 |
| Asperuloside | 0.044 ± 0.003 |
| Caffeine | 0.596 ± 0.018 |
| Epigallocatechin gallate | 0.817 ± 0.021 |
| Andrographolide | 0.475 ± 0.033 |
| Dehydroandrographolide | 0.115 ± 0.008 |