Essential Oil Composition from The Flower, Leaf and Stem of Polygonum alpinum from Turkey

Abstract

The volatile oil of Polygonum alpinum L. (Polygonaceae) was prepared by hydrodistillation of flower, leaf and stem and characterized by GC and GC-MS. A total of 44, 41 and 38 compounds were identified, constituting over 94.4, 96.3 and 97.2 % of oil composition of the flower, leaf and stem of P. alpinum, respectively. Esters were shown to be the main group of constituents (flower: 46.2 %, leaf: 59.1 %, stem: 82.5 %). The major components of the oils of P. alpinum were ethyl hexadecanoate (flower: 11.7 %, leaf: 15.0 %, stem: 21.1%), methyl linoleate (flower: 30.7 %, leaf: 11.7 %, stem: 36.7 %) and ethyl linoleate (leaf: 25.8 %, stem: 14.7 %). Terpenoids were the minor constituents in all parts (flower: 5.6 %, leaf: 11.0 %, stem: 6.4 %) of the P. alpinum.