Essential oil of the malagasy grass Elionurus tristis Hack. contains severalundescribed sesquiterpenoids

Gabriel Garcia (1) , Sylvain Sutour (2) , Delphin Rabehaja (3) , Loïc Tissandié (4) , Jean-Jacques Filippi (4) , Félix Tomi (5)

1 Chimie et Biomasse, UMR-CNRS 6134
2 NPAC - Neuchâtel Platform of Analytical Chemistry
3 Institut malgache de recherches appliquées
4 ICN - Institut de Chimie de Nice
5 SPE - Sciences pour l'environnement

Essential oils (EOs) obtained from aerial parts and roots of Elionurus tristis were investigated by GC, GC-MS, pc-GC and NMR. Both aerial parts and roots EOs contained common molecules such as α-pinene, camphene, trans-α-bergamotene and calarene. Moreover, we identified several unusual sesquiterpenes and four undescribed compounds, 7-epi-khusian-2-ol, 4,8-di-epi-acorone, 2-epi-ziza-5-en-2-ol and antsorenone. The last one exhibits an undescribed natural sesquiterpene skeleton. All undescribed compounds were isolated and fully characterized by MS, 1D and 2D-NMR. Furthermore, the formation pathway of the Antsorane skeleton is discussed.

Domaines: Chimie analytique

Gabriel Garcia, Sylvain Sutour, Delphin Rabehaja, Loïc Tissandié, Jean-Jacques Filippi, et al.. Essential oil of the malagasy grass Elionurus tristis Hack. contains severalundescribed sesquiterpenoids. Phytochemistry, 2019, 162, pp.29-38. ⟨10.1016/j.phytochem.2019.02.012⟩. ⟨hal-02124325⟩