Martynoside, forsythoside B, ladanein and 7a-acetoxyroyleanone from Ballota nigra L.

摘要

Ballota nigra L. (Lamiaceae) is widely distributed in Europe. In Hungary, this species is used as a medicinal plant, and in the new Hungarian Pharmacopoeia (VIII Edition), it has become official. We have isolated (3-sitosterol; two phenylethanoid glycosides, martynoside (Fig. 3) and forsythoside B (Fig. 1); a flavonoid, ladanein (Fig. 2); and a di-terpene, 7a-acetoxyroyleanone (Fig. 4) from B. nigra collected at the Institute of Ecology and Botany of the Hungarian Academy of Sciences at Vacratot (30km north of Budapest). A voucher specimen was deposited in the herbarium of the same institute (Index Herbariorum code VBI).