9-Methylgermacrene-B is confirmed as the sex pheromone of the sandfly Lutzomyia longipalpis from Lapinha, Brazil, and the absolute stereochemistry defined as S

The structure of the sex pheromone produced by the male sandfly Lutzomyia longipalpis, from the Lapinha Cave (Minas Gerais State) region of Brazil, previously proposed tentatively as the novel homosesquiterpene 9-methylgermacrene-B, is confirmed and the absolute stereochemistry defined as S by comparing physical and biological properties of the synthetic enantiomers with the natural product.