[Terpenoids from Euphorbia micractina]

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Euphorbia micractina is a plant species with potential medicinal properties.
• The chemical constituents of Euphorbia micractina roots have not been extensively studied.

Purpose of the Study:

• To isolate and characterize terpenoids from the ethanol extract of Euphorbia micractina roots.
• To identify novel compounds from this plant source.

Main Methods:

• Extraction of Euphorbia micractina roots using ethanol.
• Isolation of compounds using column chromatography (macroporous resin, silica gel, Sephadex LH-20) and reversed-phase High-Performance Liquid Chromatography (HPLC).
• Structure elucidation using spectroscopic data analysis.

Main Results:

• Sixteen terpenoids were isolated and identified: loliolide myristate(1), 24-methylenetirucall-8-en-3β,11α-diol-7-one(2), loliolide(3), 3β-hydroxy- 5α,6α-epoxy-7-megastigmen-9-one(4), jolkinol A(5), jolkinol D(6), latilagascene F(7), helioscopinolide A(8), helioscopinolide B(9), 3-O-acetylhelioscopinolide B(10), helioscopinolide D(11), helioscopinolide E(12), (+)-11-acetoxyatis-16-en-3,14-dione(13), erythrodiol(14), uvaol(15), and betulin(16).
• Compounds 1 (loliolide myristate) and 2 (24-methylenetirucall-8-en-3β,11α-diol-7-one) are reported as new compounds.
• All sixteen identified terpenoids represent the first reported isolation from Euphorbia micractina.

Conclusions:

• The study successfully isolated and identified sixteen terpenoids from Euphorbia micractina roots.
• Two novel terpenoids were discovered, expanding the known phytochemistry of the Euphorbia genus.
• This research provides a foundation for further investigation into the biological activities and potential applications of these compounds.