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Three Novel Triterpenoid Dienolides from Phyllanthus myrtifolius
Author(s) -
Lee ShoieSheng,
Kishore Pennaka Hari,
Chen ChungHsiung
Publication year - 2002
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(200208)85:8<2403::aid-hlca2403>3.0.co;2-o
Subject(s) - chemistry , euphorbiaceae , moiety , triterpenoid , stereochemistry , ring (chemistry) , lactone , phyllanthus , terpene , traditional medicine , botany , organic chemistry , medicine , biology
Three novel pentacyclic triterpenoid dienolides, phyllenolide A (=3 β ‐acetoxyglutina‐5(10), 6‐dien‐27,8 α ‐olide; 1 ), phyllenolide B (=3 β ‐(benzoyloxy)glutina‐5(10),6‐dien‐27,8 α ‐olide; 2 ), and phyllenolide C (=3 β ‐(2‐hydroxybenzoyloxy)glutina‐5(10),6‐dien‐27,8 α ‐olide; 3 ), were isolated from the aerial parts of Phyllanthus myrtifolius M oon . (Euphorbiaceae). These three compounds possess an endocyclic γ ‐lactone moiety across ring C and a homo‐annular diene system in ring B. Their structures were established by analyses of CD, NOED, and 2D‐NMR spectra.