In the United States, it is standard practice, once the oil has been isolated from this mixture, to "reinject" the produced water, pumping it deep underground into dedicated wells, in order to prevent damage to the local habitat.
Twelve coumarins have so far been isolated from this genus.
Moreover, various classes of phytomolecules including terpenoids, alkaloids, flavonoids, saponins, and tannins have been isolated from this plant [56].
Various sesquiterpene lactones with cytotoxic properties including 1-O-acetylbritannilactone (1) have been isolated from this Chinese medicinal plant.
Till now, a number of diterpenoids with a wide spectrum of bioactivities, including antihepatotoxic and cytotoxic activities, have been isolated from this species [10, 11, 12].
Various chemical constituents including steroids, triterpenes, lipids, flavonoids, tannins, saponins, alkaloids, sulphates, carbohydrates and glycosides have been isolated from this plant [4, 5].
Besides, compounds 4, 6 12, 15 19 were isolated from this species for the first time.
Different types of antioxidant flavonoids are isolated from this plant like quercetin, kaempherol, catechin, 6-hydroxyapigenin and some others [7 9].
For this reason, their positive identification was necessary and several compounds were isolated from this propolis sample using consecutive chromatographic procedures.
Previously, lycospidine A, a unique C15N Lycopodium alkaloid possibly derived from proline instead of the lysine biosynthetically, was isolated from this species [16].
