Figure 2.

GC–Olfactometry of vetiver oil from Haiti. The overview GC trace (FID, upper part) demonstrates the enormous complexity of this natural essential oil, being overloaded with hundreds of individual peaks. In this jungle of peaks, the blue signal indicates when the typical transparent vetiver character is recognizable at the sniffing port. As was later verified by co‐injection, these indeed correspond to ziza‐6(13)‐enone (9) and 2‐epi‐ziza‐6(13)‐enone (10).