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Five New Sesquiterpenoids from Parasenecio petasitoides
Author(s) -
Zhang Hua,
Liao ZhiXin,
Yue JianMin
Publication year - 2004
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/hlca.200490090
Subject(s) - chemistry , stereochemistry , ene reaction
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.