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Molecules 2016, 21(6), 728; doi:10.3390/molecules21060728

Four New Monoterpenoid Glycosides from the Flower Buds of Magnolia biondii

1
Collaborative Innovation Center for Respiratory Disease Diagnosis and Treatment & Chinese Medicine Development of Henan Province, Henan University of Chinese Medicine, Zhengzhou 450046, China
2
School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 19 April 2016 / Accepted: 30 April 2016 / Published: 3 June 2016
(This article belongs to the Section Natural Products)
View Full-Text   |   Download PDF [1021 KB, uploaded 3 June 2016]   |  

Abstract

Four new monoterpenoid glycosides 14, named magnoliaterpenoid A–D, were isolated from a 50% aqueous acetone extract of flower buds of Magnolia biondii, along with one known compound, (1′R,3′S,5′R,8′S,2Z,4E)-dihydrophaseic acid 3-O-β-d-glucopyranoside (5). Their structures and relative configuration were identified by extensive spectroscopic analysis (IR, UV, MS, 1D and 2D NMR). The aglycones of these four new compounds possess seven-membered rings systems, which are very rare. A plausible biosynthetic route for the four new compounds was proposed via the biogenetic isoprene rule. Compounds 1, 2, 3, and 4 showed no antimicrobial activity at the concentration range of 1.95–250 µg/mL. View Full-Text
Keywords: Magnoliaceae; flower buds of Magnolia biondii; monoterpenoid glycosides; biosynthetic route Magnoliaceae; flower buds of Magnolia biondii; monoterpenoid glycosides; biosynthetic route
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Feng, W.-S.; He, Y.-H.; Zheng, X.-K.; Wang, J.-C.; Cao, Y.-G.; Zhang, Y.-L.; Song, K. Four New Monoterpenoid Glycosides from the Flower Buds of Magnolia biondii. Molecules 2016, 21, 728.

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