Results 151 to 160 of about 1,584 (196)

Leucophyllinines A and B, bisindole alkaloids from Leuconotis eugeniifolia

Journal of Natural Medicines, 2019
Two new bisindole alkaloids, leucophyllinines A (1) and B (2) consisting of eburnane and quebrachamine-type skeletons were isolated from the bark of Leuconotis eugeniifolia, and their structures were elucidated on the basis of spectroscopic data. Leucophyllinines A and B showed antiplasmodial activities against Plasmodium falciparum 3D7.
Tang, Yiming, Nugroho, Alfarius Eko, Hirasawa, Yusuke, Tougan, Takahiro, Horii, Toshihiro, A. Hadi, A. Hamid, Morita, Hiroshi   +6 more
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Racemic Bisindole Alkaloids: Structure, Bioactivity, and Computational Study

Chinese Journal of Chemistry, 2021
Main observation and conclusionThe new racemic and dimeric indole alkaloids with the characteristic cyclopenta[b]indole backbone, (+)‐ and (–)‐spondomine (1a/1b), were isolated from a cultured sponge Tedania anhelans. A semi‐synthesis was employed to obtain 1a/1b and the other four stereoisomers 1c—1f.
Tian‐Yun Jin, Ping‐Lin Li, Ci‐Li Wang, Xu‐Li Tang, Mei‐Mei Cheng, Yuan Zong, Lian‐Zhong Luo, Hui‐Long Ou, Ke‐Chun Liu, Guo‐Qiang Li   +9 more
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Bisindole alkaloids.

The Alkaloids. Chemistry and biology, 2007
This chapter provides an overview on bisindole alkaloids. The indole–indole and tryptamine–tryptamine type, and related alkaloids are discussed. Tryptamine–tryptamine type with an additional monoterpene unit and related alkaloids are briefly discussed.
Kam, Toh Seok, Choo, Yeun Mun
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Crooksiine, a bisindole alkaloid from Haplophyton crooksii

Phytochemistry, 1991
Abstract Crooksiine, a new bisindole alkaloid with antiacetylcholinesterase activity was isolated from Haplophyton crooksii . Its structure was established utilizing spectrometric methods.
Mohamad Mroue, Maktoob Alam
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New vobasinyl-ibogan type bisindole alkaloids from Tabernaemontana corymbosa

Fitoterapia, 2015
Ten vobasinyl-ibogan type bisindole alkaloids, including three new ones, tabercorines A-C (1-3), and a new natural product, 17-acetyl-tabernaecorymbosine A (4), were isolated from the twigs and leaves of Tabernaemontana corymbosa. Their structures were elucidated on the basis of spectroscopic data, and the NMR data of 17-acetyl-tabernaecorymbosine A (4)
Yu, Zhang, Lingli, Guo, Guangmei, Yang, Feng, Guo, Yingtong, Di, Shunlin, Li, Duozhi, Chen, Xiaojiang, Hao   +7 more
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Three New Cytotoxic Monoterpenoid Bisindole Alkaloids from Tabernaemontana bufalina

Planta Medica, 2018
AbstractThree new bisindole alkaloids, 3′-(2-oxopropyl)-19,20-dihydrotabernamine (1), 3′-(2-oxopropyl)-ervahanine B (2), 19,20-dihydrovobparicine (3), and 20 known compounds were isolated from the aerial parts of Tabernaemontana bufalina. The structures of these alkaloids were elucidated using spectroscopic methods.
Si-Yuan, Zhou, Ting-Lan, Zhou, Guofu, Qiu, Xiajuan, Huan, Ze-Hong, Miao, Sheng-Ping, Yang, Shugeng, Cao, Fengkai, Fan, You-Sheng, Cai   +8 more
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Synthesis of a novel series of cytotoxic bisindole alkaloids

Bioorganic & Medicinal Chemistry Letters, 2001
Original cytotoxic bisindole alkaloids with a 1,2,3,4-tetrahydroquinoline bridge were synthesized by reductive amination with various anilines. The most cytotoxic compounds display a high and dose-dependent cell cycle effect with accumulation in the G1 phase.
M, Raoul, C, Schaeffer, S, Léonce, A, Pierré, G, Atassi, R, Hocquemiller, G, Lewin   +6 more
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Cytotoxic eburnamine-aspidospermine type bisindole alkaloids from Bousigonia mekongensis

Fitoterapia, 2014
Four new eburnamine-aspidospermine type bisindole alkaloids, namely, mekongenines C-F (1-4), along with 27 known indole alkaloids were isolated from the twigs and leaves of Bousigonia mekongensis. Their structures with the absolute configurations were elucidated by spectroscopic methods and ECD analyses.
Yan-Hui, Fu, Shun-Lin, Li, Shi-Fei, Li, Hong-Ping, He, Ying-Tong, Di, Yu, Zhang, Xiao-Jiang, Hao   +6 more
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Aspidospermatan–aspidospermatan and eburnane-sarpagine bisindole alkaloids from Leuconotis

Phytochemistry, 2010
Leucofoline and leuconoline, representing the first members of the aspidospermatan-aspidospermatan and eburnane-sarpagine subclasses of the bisindole alkaloids, respectively, were isolated from the Malayan Leuconotis griffithii. The structures of these bisindole alkaloids were established using NMR and MS analysis, and in the case of leuconoline ...
Gan, Chew Yan, Low, Yun Yee, Robinson, W.T., Komiyama, K., Kam, Toh Seok   +4 more
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Chapter 4 Bisindole Alkaloids

2006
Publisher Summary This chapter provides an overview on bisindole alkaloids. The indole–indole and tryptamine–tryptamine type, and related alkaloids are discussed. Tryptamine–tryptamine type with an additional monoterpene unit and related alkaloids are briefly discussed.
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