Results 191 to 200 of about 12,097 (227)

Trimeric and dimeric Aspidosperma-type alkaloids from leaves of Tabernaemontana divaricata 'Dwaft'.

Bioorganic chemistry (Print), 2021
Continued interest in bioactive monoterpenoid indole alkaloids and the purpose to explore the artificial cultivation influence on the chemical composition in the same plant species, 8 undescribed Aspidosperma-type alkaloids including two unprecedented ...
Jing Chen, Yang Yu, Jing Wu, Mei–Fen Bao, S. Kongkiatpaiboon, J. Schinnerl, Xiang-Hai Cai   +6 more
semanticscholar   +1 more source

Aspidosperma–aspidosperma-type bisindole alkaloids from Voacanga africana

Tetrahedron, 2013
Abstract Four new aspidosperma–aspidosperma-type bisindole alkaloids 1–4 were isolated from the seeds and root bark of Voacanga africana (Apocynaceae) and their structures were determined by spectroscopic analysis. Among them, voacandimine A (2) featured a linkage mode new to dimeric monoterpenoid indole alkaloids.
Mariko Kitajima, Masumi Iwai, Noriyuki Kogure, Ruri Kikura-Hanajiri, Yukihiro Goda, Hiromitsu Takayama   +5 more
openaire   +1 more source

Aspidosperma and Strychnos alkaloids: Chemistry and biology.

The Alkaloids: Chemistry and Biology, 2021
Of Nature's nearly 3000 unique monoterpene indole alkaloids derived from tryptophan, those members belonging to the Aspidosperma and Strychnos families continue to impact the fields of natural products (i.e., isolation, structure determination ...
Senzhi Zhao, G. Sirasani, R. Andrade
semanticscholar   +1 more source

Wood of Aspidosperma Sections Aspidosperma and Pungentia (Apocynaceae) from Mato Grosso Do Sul State, Brazil: Taxonomic Implications

Systematic Botany, 2021
Aspidosperma (Apocynaceae) is composed of trees and shrubs; the genus includes 70 species, 42 of which occur in Brazil. The midwestern region has the second highest diversity, with 30 species, after the northern region, and Mato Grosso do Sul state has ...
M. A. Farinaccio, M. V. Santiago Urquiza, D. J. Machate, João Marcelo de Figueiredo Braga, C. de Araujo, Suziele G. Batista, Rosani do Carmo de Oliveira Arruda   +6 more
semanticscholar   +1 more source

Aspidosperma-type bisindole alkaloids from Melodinus suaveolens and their antiproliferative activities.

Phytochemistry
Melosuadimins A-L (1-12), twelve undescribed monoterpenoid dimeric alkaloids with different subsets of aspidosperma-type alkaloid units were isolated from Melodinus suaveolens.
Jing Wu, Wei Wu, Mei-Feng Bao, Yang Yu, Xiang-Hai Cai   +4 more
semanticscholar   +1 more source

Development of a Strategy for the Total Synthesis of Aspidosperma Alkaloids via the Cyclobutenone-Based PET-Initiated Cationic Radical-Driven [2+2]/Retro-Mannich Reaction.

Organic Letters
A novel strategy for the synthesis of Aspidosperma alkaloids has been achieved via a photoredox-initiated [2+2]/retro-Mannich reaction of tryptamine-substituted enaminones as a key step. The developed chemistry has been applied to the construction of the
Jian-Yu Long, Rudong Liu, Xinpeng Mu, Zhi-Lin Song, Zhongchao Zhang, Zhen Yang   +5 more
semanticscholar   +1 more source

Voacafrines A-N, aspidosperma-type monoterpenoid indole alkaloids from Voacanga africana with AChE inhibitory activity.

Phytochemistry, 2020
Fourteen undescribed monoterpenoid indole alkaloids, voacafrines A-N, along with 7 known monoterpenoid indole alkaloids were isolated from the seeds of Voacanga africana Stapf.
Qian Zhao, Wentao Zhu, Xiao Ding, Zong-Qing Huo, P. O. Donkor, T. Adelakun, X. Hao, Yu Zhang   +7 more
semanticscholar   +1 more source

Anther wall and pollen development in Aspidosperma Mart & Zucc. (Apocynaceae)

Botanical journal of the Linnean Society
Apocynaceae is one of the richest flowering plant families, and the complexity of their reproductive structures and morphological diversity of the flowers has been considered central to understanding its evolutionary success and diversification ...
D. M. Alves, L. S. Souto, I. Koch
semanticscholar   +1 more source

Tabernaesines A-I, Cytotoxic Aspidosperma-Aspidosperma-Type Bisindole Alkaloids from Tabernaemontana pachysiphon.

Journal of Natural Products, 2020
Twenty-one aspidosperma-aspidosperma alkaloids, including the new tabernaesines A-J (1-9), were obtained from Tabernaemontana pachysiphon. The structures and absolute configurations were elucidated using HRMS and NMR experiments.
Wen-fang Yi, Xiao Ding, Yuan-Zhi Chen, T. Adelakun, Yu Zhang, X. Hao   +5 more
semanticscholar   +1 more source

Longitudinal and Radial Variation in Aspidosperma pyrifolium Wood Density

TreeDimensional
The Caatinga is a biodiversity biome. However, it lacks information about the timber potential of native vegetation. Aspidosperma pyrifolium Mart. is a native species with diverse qualities and uses for wood.
Ramona Rodrigues Amaro de Oliveira, Joana Alice Galdino de Souza, Ana Karla Vieira da Silva, Márcia Ellen Chagas dos Santos, Edgley Alves de Oliveira Paula, Rafael Rodolfo de Melo   +5 more
semanticscholar   +1 more source