Results 131 to 140 of about 7,538 (194)

Sesquiterpene polyol esters from Tripterygium wilfordii

Phytochemistry, 2001
The extract (T(II)) of Tripterygium wilfordii Hook f. afforded four sesquiterpene esters: 1beta,2beta,5alpha,8beta,11-pentaacetoxy-4alpha-hydroxy-3alpha(2'-methylbutanoyl)-15-nicotinoyl-7-oxo-dihydroagarofuran; 1beta,5alpha,11-triacetoxy-7beta-benzoyl-4alpha-hydroxy-8beta-nicotinoyl-dihydroagarofuran; 1beta,2beta,5alpha,11-tetraacetoxy-8alpha-benzoyl ...
H Q, Duan, Y, Takaishi, Y F, Jia, D, Li
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Sesquiterpene polyol esters from Celastrus rosthornianus

Phytochemistry, 1991
Abstract A new β-dihydroagarofuran sesquiterpene polyol ester has been isolated from the root bark of Celastrus rosthornianus . Its structure was elucidated, on the basis of 1H NMR, 13C NMR, NOE, IR and high resolution mass spectrometry, as 1β-acetoxy-8β,9α-dibenzoyloxy-4α,6α-dihydroxy-2β (α-methylbutanoyloxy)-β-dihydroagarofuran. The long-range
Yongqiang Tu, Yaozu Chen
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Insecticidal sesquiterpene polyol esters from Celastrus angulatus

Phytochemistry, 2001
Three insecticidal sesquiterpene polyol esters were isolated from the root bark of Celastrus angulatus by bioassay-guided fractionation. Their chemical structures were elucidated as 1 alpha,2 alpha-diacetoxy-8 beta-isobutanoyloxy- 9 alpha-benzoyloxy-13-(alpha-methyl)butanoyloxy-4 beta, 6 beta-dihydroxy-beta-dihydroagarofuran (1), 1 alpha,2 alpha ...
W, Wenjun, W, Mingan, Z, Wenming, Z, Jinbo, J, Zhiqing, H, Zhaonong   +5 more
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Sesquiterpene polyol esters from Celastrus gemmatus

Phytochemistry, 1990
Abstract From the seed oil of Celastrus gemmatus, four new β-dihydroagarofuran sesquiterpene polyol esters were isolated. Their structures were established on the basis of X-ray diffraction, spectral analysis and chemical reaction.
Yongqiang Tu, Dagang Wu, Jun Zhou, Yaozu Chen   +3 more
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Sesquiterpene polyol esters from Celastrus angulatus

Phytochemistry, 1992
Abstract Three new sesquiterpene polyol esters were isolated from the seed oil of Celastrus angulatus. Their structures were elucidated, on the basis of mass and NMR spectrometry, as 6α-acetoxy-1β,8β,9β-tribenzoyloxy-β-dihydroagarofuran,1β,8β,13-triacetoxy-9β-benzoyloxy-β-dihydroagarofuran and 1β,8α,13-triacetoxy-9p-benzoyloxy-β-dihydroagarofuran.
Tu Y.Q, Hu Y.J, Wu W.J, Chen N.Y, Pan X.F   +4 more
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Measurements and Correlations of the Thermal Conductivity of Three Polyol Esters and a Polyol Ester-Based Lubricant

International Journal of Thermophysics, 2020
This work describes measurements of the thermal conductivity of three polyol esters pentaerythritol tetrapentanoate (POE5), pentaerythritol tetraheptanoate (POE7), pentaerythritol tetranonanoate (POE9), and a fully qualified lubricant meeting military specification MIL-PRF-23699 with a transient hot-wire method.
Richard A. Perkins, Marcia L. Huber
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Three new sesquiterpene polyol esters from Celastrus angulatus

Journal of Asian Natural Products Research, 2021
Three new sesquiterpene polyol ester compounds angulatins S-U, together with three known compounds were isolated from Celastrus angulatus Maxim. According to mainly 1D NMR and 2D NMR analysis, the structures of the new compounds were completely determined as angulatin S (1β-furoyloxy-2β,8α-diisobutanoyloxy-9β-benzoyloxy-15-acetoxy-4α,6α-dihydroxy-β ...
Wei, Zhao, Xia, Chang, Hang, Yuan, Hong-Yuan, Han, Fei, Chen, Huai-Yu, Liao, Hai-Yan, Zhang, Tian-Zeng, Zhao   +7 more
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Sesquiterpene Polyol Esters from Celastrus paniculatus

Journal of Natural Products, 1991
From the MeOH extract of the seed oil of Celastrus paniculatus, a known sesquiterpene, 1-beta,6-alpha, 8-beta-triacetoxy-9-alpha-(beta-furancarbonyloxy)-beta-dihydroagarofuran [1], and a new sesquiterpene, 1-beta,6-alpha-diacetoxy-9-beta-benzoyloxy-8-beta-cinnamoyloxy-beta-dihydroagarofuran [2], were isolated.
Yong Q. Tu, Tong X. Wu, Zi Zh. Li, T. Zhen, Yao Z. Chen   +4 more
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Polyol Esters of 3-Butenoic Acid.

Journal of Chemical & Engineering Data, 1963
(3) (3, 4 ) . The pure carbonate was observed to undergo rapid decomposition to C02 , 2-cyclopentenol, and cyclopentadiene a t about 100°C. Epoxidation was effected by (4) treatment with peracetic acid in ethyl acetate (1) to yield a new diepoxy carbonate, bis(2,3-epoxycyclopentyl) carbonate.
John W. Lynn, Richard L. Roberts
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