Y
Yuan-Wah Leong
Researcher at National University of Singapore
Publications - 13
Citations - 341
Yuan-Wah Leong is an academic researcher from National University of Singapore. The author has contributed to research in topics: Xanthone & Bulbophyllum vaginatum. The author has an hindex of 8, co-authored 13 publications receiving 319 citations.
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Phenanthrenes, dihydrophenanthrenes and bibenzyls from the orchid bulbophyllum vaginatum
TL;DR: Two new phenanthrenes (4,9-dimethoxyphenanthrene-2,5-diol and 4,6-dimethyltoxymethylhexane-1,3,7-triol) and two new 9,10-dihydrophenanthreness (4methoxy-9, 10-dibenzyls and the triterpenoid friedelin were isolated and characterized from the hexane extract of the orchid Bulbophyllum vaginatum) were determined by spectroscopic analyses
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Phenanthrene and other aromatic constituents of Bulbophyllum vaginatum
TL;DR: Two new phenanthrenes (4-methoxyphenanthrene-2,3,7-triol and 4-methyltetrol) and two new 9,10-dihydrophenthrenes were discovered in this paper.
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(20R,23E)-Eupha-8,23-diene-3β,25-diol from Tripetalum cymosum
TL;DR: A new triterpenoid, (20 R,23 E )-eupha-8,23-diene-3β,25-diol was isolated from the leaves of Tripetalum cymosum and its structure was determined by spectral analysis and chemical correlation with euphol.
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A dihydrochalcone from Lindera lucida
TL;DR: A new dihydrochalcone, 3′,5′-dihydroxy-2′,4′,6′-trimethoxydihydro-chalcone and five known compounds were isolated from twigs of Lindera lucida as mentioned in this paper.
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ENT-trachylobane diterpenoids from the liverwort Mastigophora diclados
TL;DR: The Malaysian liverwort Mastigophora diclados afforded ent -trachyloban-18-oic acid, ent -branch-19-OIC acid and the novel ent -18-hydroxy trachyl-oban 19-Oic acid using 1 H and 13 C NMR spectroscopy as discussed by the authors.