1,2:3,4-Diepoxy-p-menthane and 1,4-Epoxy-p-menth- 2-ene: Rare Monoterpenoids from the Essential Oil of<i>Chenopodium ambrosioides</i>L. var<i>ambrosioides</i>Leaves

Abstract

Abstract The composition of the essential oil of leaves from Chenopodium ambrosioides L. var ambrosioides was analyzed by capillary GC and GC/MS. Ten compounds were identified accounting for 94.6% of the total oil. 1,2:3,4-Diepoxy-p-menthane and 1,4-epoxy-p-menth-2-ene were isolated from the oil; it was the first time that these compounds were identified from Chenopodium ambrosioides L. var ambrosioides. The major compounds in the hydrodistillate were α-terpinene (55.6%), p-cymene (16.7%) and 1,4-epoxy-p-menth-2-ene (17.7%).