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Five New Sesquiterpenoids from Parasenecio petasitoides

✍ Scribed by Hua Zhang; Zhi-Xin Liao; Jian-Min Yue

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
113 KB
Volume
87
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

From the whole plants of Parasenecio petasitoides, five new sesquiterpenoids were isolated, (E,E)‐3__α__,9__β__‐dihydroxy‐6__β__H,11__β__H‐13‐norgermacra‐1(10),4‐dien‐11,6‐carbolactone (2), (E,E)‐2__α__,9__β__‐dihydroxy‐6__β__H,11__β__H‐13‐norgermacra‐1(10),4‐dien‐11,6‐carbolactone (3), (E,E)‐2__α__,9__β__‐dihydroxy‐6__β__H,11__α__H‐13‐norgermacra‐1(10),4‐dien‐11,6‐carbolactone (4), (E)‐15‐hydroxy‐2‐oxo‐6__β__H,11__α__H‐13‐norguaia‐3‐ene‐11,6‐carbolactone (7), and (E)‐11__β__,15‐dihydroxy‐2‐oxo‐6__β__H‐13‐norguaia‐3‐ene‐11,6‐carbolactone (8), together with three known compounds, deacetyl herbolide A (1), jacquilenin (5), and (E)‐15‐hydroxy‐2‐oxo‐6__β__H,11__β__H‐13‐norguaia‐3‐ene‐11,6‐carbolactone (6). The structures of these natural products were elucidated spectroscopically, especially by 1D‐ and 2D‐NMR techniques, in combination with high‐resolution mass spectroscopy.

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