A New Premyrsinane-type Diterpenoid Polyester from Euphorbia dracunculoides Lam

摘要

Phytochemical investigation of the 70% aqueous acetone extract of Euphorbia dracunculoides Lam. afforded a new premyrsinane-type diterpenoid polyester, 3 β - O -isobutyryl-5 α - O -benzoyl-7 β ,13 β -di- O -acetyl-17- O -nicotinoylpremyrsinol (1), and two known analogues, euphorbialoids C (2) and D ( 3 ). Their structures were elucidated by means of extensive spectroscopic analysis (NMR and ESI-MS) and comparison with data reported in the literature.