Farnesane-Type Sesquiterpenoids with Antibiotic Activity from .

Brullo is an Asteraceae plant species endemic to Lampedusa island, the largest island of the Pelage archipelago, Italy. The organic extract of its whole aerial parts, showing antibiotic activity against and , wasfractionated employing bioguided purification procedures affording three main farnesane-type sesquiterpenoids. They were identified by spectroscopic methods (NMR and ESIMS data) as the ()-3,7,11-trimethyldodeca-1,6,10-triene-3,9-diol, ()-10-hydroxy-2,6,10-trimethyldodeca-2,6,11- trien-4-one and ()-10-hydroxy-2,6,10-trimethyl-dodeca-6,11-dien-4-one, commonly named 9-hydroxynerolidol, 9-oxonerolidol, and chiliadenol B, respectively. These three sesquiterpenes, isolated for the first time from , were tested on methicillin-resistant and showing antibacterial and antibiofilm activities. This plant could be used as a source to isolate secondary metabolites as potential new antibiotics.