Essential oil composition and antimicrobial activity of Ballota nigra L. ssp foetida.Nat Prod Commun. 2009 Apr; 4(4):585-8.NP
The chemical composition of the essential oil of Ballota nigra L. ssp foetida obtained from the flowering aerial parts was analyzed by GC/MS. From the 37 identified constituents of the oil, beta-caryophyllene (20.0%), germacrene D (18.0%) and caryophyllene oxide (15.0%) were the major components. The oil was active against both Gram-negative and Gram-positive bacteria as well as against three Candida species.