(−)-5,6-Dehydrocamphor from the antifungal essential oil of Zuccagnia punctata

► A total of 80 constituents, mainly oxygenated monoterpenes, were identified. ► Different composition patterns were found within the populations investigated. ► (−)-5,6-Dehydrocamphor was first isolated and its structure completely defined. ► The oil is mainly active against dermatophytes, especially Tricophyton rubrum. ► Morphological details of glandular and non-glandular thrichomes are reported.