Analysis of the chemical composition of essential oil from Algerian Inula viscosa (L.) Aiton

The chemical composition of the essential oil of Inula viscosa (L.) leaves, obtained by both hydrodistillation and steam distillation, was investigated by GC–MS. The major components for hydrodistillation were: 12-carboxyeudesma-3,11 (13) diene (28.88%); linolenic acid (7.80%); palmitic acid (5.38%); butyl hydroxy toluene (4.11%) and fokienol (3.37%), while for steam distillation were: 12-carboxyeudesma-3,11 (13) diene (56.81%); 2,3-didehydrocostic acid (3.25%); butyl hydroxy toluene (2.63%) and pentacosane (2.31%).