Zur Kenntnis des Wasserdampfdestillates der Blätter von Juglans regia*

Abstract

From steam distilled leaves of Juglans regia L. 26 terpenoid substances (21 monoterpenes, two sesquiterpenes, one diterpene and two compounds originated from terpenoids) and eugenol have been isolated. Additionally, 23 hydrocarbons with a chain length from C₁₉ to C₃₁ and 21 fatty acids (C₆-C₂₀) including geranic acid have been detected. The substances have been identified by comparing TLC, GLC correlating methods, and partly by GLC-MS. There are at least 50% of typical components of essential oils present, another nearly 24% contain the hydrocarbon fraction and nearly 27% the fatty acids. It is assumed that the steam distilled product contains more sesquiterpens and other substances originated from esters of fatty acids, which were yet not identified. A main component is β-eudesmol (∼ 10%). Leaves harvested in autumn produce a distillation product of good yield with a constant composition. The product of steam distillation acts as an antifungal. Its properties favor the external use in folk medicine of the drug Folia Juglandis.

Key Word Index

Juglans regia - Juglandaceae - Essential Oil - Steam Distillation Product - Terpenoids - Hydrocarbons - Fatty Acids - Antimicrobial Activity