Results 151 to 160 of about 1,096 (185)

A New Kaurane Diterpene from the Seeds of Vernonia anthelmintica

Chemistry of Natural Compounds, 2018
A new kaurane diterpene, 16α,17-acetonide-3α-hydroxykauran (1), and four known octadecenoic acid derivatives,12,13,17-trihydroxy-9(Z)-octadecenoic acid methyl ester (2), 12,13,17-trihydroxy-9(Z)-octadecenoic acid (3), tianshic acid (4), and 1,3-divernolin (5), were isolated from the seeds of Vernonia anthelmintica.
A. Turak, Z. Maimaiti, H. A. Aisa
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Three new ent-kaurane diterpenes from the herbs of Wedelia prostrata

Journal of Natural Medicines, 2016
Three new ent-kaurane diterpenes, 3α-angeloyloxy-17-hydroxy-ent-kaur-15-en-19-oic acid (1), 3α-tigloyloxy-17-hydroxy-ent-kaur-15-en-19-oic acid (2) and 3α-cinnamoyloxykaur-9(11),16-dien-19-oic acid (3), along with five known compounds (4-8), were isolated from the herbs of Wedelia prostrata (Asteraceae).
Zhongnan, Wu, Yubo, Zhang, Li, Yang, Nenghua, Chen, Lin, Jiang, Siqi, Jiang, Guoqiang, Li, Yaolan, Li, Guocai, Wang   +8 more
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Cytotoxic Trachylobane and Kaurane Diterpenes from Psiadia punctulata

2020
Original NMR data (FIDs).
Yaouba, Souaibou, Valkonen, Arto, von der Heiden, Daniel, Lindblad, Sofia, Coghi, Paolo, Irungu, Beatrice, Midiwo, J. O., Wong, Vincent K. W., Yenesew, Abiy, Erdelyi, Mate   +9 more
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Involvement of Nrf2 signaling pathway in the neuroprotective activity of natural kaurane diterpenes

Neuroscience, 2013
Oxidative stress is a common harmful condition of several neurodegenerative diseases. Antioxidants represent the medical choice strategy for protection against this unbalanced oxidant-antioxidant status. The present study was undertaken to address the role of kaurane diterpenes foliol, linearol and sidol in the protection against H(2)O(2)-induced ...
E, González-Burgos, M E, Carretero, M P, Gómez-Serranillos   +2 more
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Preparation and Phytotoxicity of Novel Kaurane Diterpene Amides with Potential Use as Herbicides

Journal of Agricultural and Food Chemistry, 2008
Novel kaurane ditepene monoamides were synthesized in good yields directly from kaurenoic ( 1) and grandiflorenic ( 2) acids and unprotected symmetrical diamines, using a modified protocol for monoacylation. Amides from 1 and 2 and monoamines were also obtained and tested against seed germination and growth of radicle and shoot of Lactuca sativa ...
Maria Amélia Diamantino, Boaventura, Rondinelle Gomes, Pereira, Luiza B, de Oliveira Freitas, Leandro Alves, Dos Reis, Henriete, da Silva Vieira   +4 more
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Kaurane and kaurene diterpenes from the stem bark of Xylopia acutiflora

Phytochemistry, 1982
Abstract Four diterpenes were isolated from the stem bark of Xylopia acutiflora and characterized as (−)-kauran-16α-ol, 7,8-acetoxy-(−)-kaur-16-en-19-oic acid, 15-oxo-(−)-kaur-16-en-19-oic acid, and 16α- hydroxy-(−)-kauran-19-oic acid.
Choudhury M. Hasan, Terence M. Healey, Peter G. Waterman   +2 more
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Frutoic acid, a dimeric kaurane diterpene from Xylopia frutescens

Phytochemistry, 1995
Sitosterol and six diterpenes were isolated from green fruit, stem bark and leaves of Xylopia frutescens and characterized as ent-15α-acetoxy-kaur-16-en-19-oic acid (xylopic acid), ent-kaur-16-en-19-oic acid (kaurenoic acid), ent-16β-hydroxy-kaurane, ent-kaur-16-en-19-ol, ent-16β-hydroxy-kauran-19-oic acid and ent-16β,17-dihydroxy-kauran-19-oic acid ...
Jacqueline A. Takahashi, Maria Amélia D. Boaventura, Joaquim de Carvalho Bayma, Oliveira Alaíde B.   +3 more
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Nor-ent-kaurane diterpenes and hydroxylactones from Antennaria geyeri and Anaphalis margaritacea

Phytochemistry, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ahmed A, Ahmed, Taha A, Hussein, Ahmed A, Mahmoud, Mohamed A, Farag, Paul W, Paré, Małgorzata, Wojcińska, Joe, Karchesy, Tom J, Mabry   +7 more
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Kolavane and kaurane diterpenes from the stem bark of Xylopia aethiopica

Phytochemistry, 1982
Abstract The stem bark of Xylopia aethiopica has yielded four diterpenes, two of them novel. Three of the diterpenes were identified as (−)-kaur-16-en-19-oic acid and its 7-oxo and 7β-hydroxy derivatives. The fourth was the novel kolavane derivative 2-oxo-kolav-3,13-dien-15-oic acid, a type of compound not previously recorded in the Annonaceae.
Choudhury M. Hasan, Terence M. Healey, Peter G. Waterman   +2 more
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Complete1H and13C NMR assignment of a kaurane diterpene fromPiliostigma thonningii

Magnetic Resonance in Chemistry, 1997
The diterpene ent-16α-hydroxykauran-18-oic acid was isolated from the leaves of Piliostigma thonningii. Structural elucidation and complete 1H and 13C NMR chemical shift assignments of this compound were achieved by 2D experiments. © 1997 John Wiley & Sons, Ltd.
M.-T. Martin, M. Païs, A. O. Ogundaini, J. C. Ibewuilke, F. O. Ogungbamila   +4 more
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