Results 161 to 170 of about 2,271 (197)

[Meroterpenoids from Rhododendron nivale].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2023
To elucidate the chemical material basis of Rhododendron nivale, this study comprehensively used various chromatographic techniques to isolate and obtain five new meroterpenoid enantiomers(1a/1b-5a/5b) from the ethyl acetate extract of R. nivale. A variety of spectral analytical methods, such as high-resolution mass spectrometry(HRMS), nuclear magnetic
Xi, Zeng, Xi, Zhao, Wei, Liu, Tao, Yuan
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Spiro Meroterpenoids from Ganoderma applanatum

Journal of Natural Products, 2016
Spiroapplanatumines A-Q (1-12, 14-16, 18, and 20), new spiro meroterpenoids respectively bearing a 6/5/7 or 6/5/5 ring system, along with three known compounds, spirolingzhines A, B, and D, were isolated from the fruiting bodies of the fungus Ganoderma applanatum.
Qi Luo, Xiao-Yi Wei, Jing Yang, Jin-Feng Luo, Rui Liang, Zheng-Chao Tu, Yong-Xian Cheng   +6 more
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Enantiomeric pairs of meroterpenoids from Rhododendron fastigiatum

Chinese Journal of Natural Medicines, 2019
Five pairs of optically pure meroterpenoid enantiomers (1a/1b-5a/5b) and two known compounds (6 and 7) were isolated from Rhododendron fastigiatum. Compounds 1a/1b-5a/5b were resolved from naturally scalemic mixtures by chiral HPLC. Their structures were elucidated by spectroscopic methods, X-ray crystallographic experiments, and ECD analyses ...
Guang-Hui, Huang, Chun, Lei, Ke-Xin, Zhu, Jing-Ya, Li, Jia, Li, Ai-Jun, Hou   +5 more
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Renoprotective meroterpenoids from the fungus Ganoderma cochlear

Fitoterapia, 2019
Nine multifarious new meroterpenoids, cochlearols E-M (1-9), along with seven known meroterpenoids 10-16, were isolated from the fruiting bodies of Ganoderma cochlear. Racemic 1, 6-8, 10 and 13 were separated by chiral HPLC. The structures were elucidated based on detailed spectroscopic analyses (HRESIMS, 1D/2D-NMR) and calculated electronic circular ...
Xin-Long, Wang, Ze-Hong, Wu, Lei, Di, Feng-Jiao, Zhou, Yong-Ming, Yan, Yong-Xian, Cheng   +5 more
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Neuroinhibitory meroterpenoid compounds from Cordia oncocalyx

Fitoterapia, 2017
Five new meroterpenoid compounds designed as rel-10β,11β-epoxy-2,11-dimethoxy-8α-hydroxy-8aβ-methyl-5α,6,7,8,8a,9,10,10aβ-octahydro-1,4-anthracendione (1), rel-10β,11β-epoxy-8α,5-dihydroxy-2-methoxy-8aβ-methyl-5,6,7,8,8a,9,10,10aβ-octahydro -1.4-anthracendione (2), rel-1,4,8α-trihydroxy-5-furanyl-2-methoxy-8aβ-methyl-6,7,8, 8a,9,10-hexahydro-10 ...
Taynara S, Matos, Ana Karine O, Silva, Amanda L, Quintela, L, Francisco das Chagas Pinto, Kirley M, Canuto, Raimundo, Braz-Filho, Maria Júlia S, Fonseca, Angélica Maria, Luna-Costa, Iury A, Paz, Nilberto Robson F, Nascimento, Edilberto R, Silveira, Otilia Deusdênia L, Pessoa   +11 more
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Epimerization of Yahazunol-Related Meroterpenoids for Antifungal Leads

Journal of Natural Products
We herein disclose that the epimerization of yahazunol can lead to an antifungal enhancement. Yahazunol-related drimane meroterpenoids and pseudonatural mimics were synthesized based on an improved synthesis of 9-epi-borono-sclareolide and the concomitant Suzuki coupling. Several 9-epi-drimane meroterpenoids presented antifungal activity.
Shengxin Sun, Shiqi Fu, Nvdan Hu, Xu Zhang, Xia Wang, Shengkun Li   +5 more
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Meroterpenoids—I

Tetrahedron, 1973
G. Mehta, U.R. Nayak, Sukh Dev
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Meroterpenoids—III

Tetrahedron, 1973
N.P. Damodaran, Sukh Dev
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Meroterpenoids—II

Tetrahedron, 1973
A.S.C.Prakasa Rao, V.K. Bhalla, U.R. Nayak, Sukh Dev   +3 more
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Total biosynthesis of terpenoids and meroterpenoids

Bulletin of the Chemical Society of Japan
Abstract This account focuses on the synthetic biology-based synthesis of biologically active terpenoids and meroterpenoids conducted in our laboratory. Particular emphasis is placed on the complete analysis of biosynthetic pathways and the mechanistic analysis of key transformation in the biosynthesis of individual natural products ...
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