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Structural studies of the chemical constituents of Tithonia tagetiflora Desv. (Asteraceae)
Author(s) -
Huynh Ngoc Vinh,
Nguyen Thi Hoai Thu,
Nguyen Kim Phi Phung,
Hansen Poul Erik
Publication year - 2013
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.3963
Subject(s) - tithonia , chemistry , asteraceae , sesquiterpene , triterpene , stereochemistry , terpene , two dimensional nuclear magnetic resonance spectroscopy , triterpenoid , botany , medicine , alternative medicine , pathology , biology
Tithonia tagetiflora Desv. (Asteraceae) is a widespread plant in Vietnam, and the species of Tithonia are known as plants containing many biologically active compounds. However, T . tagetiflora 's chemical composition remains mostly unknown. Therefore, we now report the structural elucidation of two new sesquiterpene lactones, 8‐angeloyloxy‐2,14‐epoxygermacra‐4,10(1),11(13)‐trien‐6,12‐olide (1) and 6‐angeloyloxy‐1‐hydroxy‐3,4‐epoxygermacra‐9,11(13)‐dien‐8,12‐olide (2), together with three known compounds, including two norisoprenoids, (6 S ,9 S )‐vomifoliol or (6 R ,9 R )‐vomifoliol (3) and (6 S ,9 S )‐roseoside (4), and one glutinane type triterpene, epi‐glutinol (5), from the leaves of T . tagetiflora . Their structures are established by 1D and 2D NMR spectroscopy, as well as ESI‐MS analysis and comparison with literature data. Copyright © 2013 John Wiley & Sons, Ltd.