Results 81 to 90 of about 48,569 (170)

Strychnobaillonine, an Unsymmetrical Bisindole Alkaloid with an Unprecedented Skeleton from Strychnos icaja Roots

, 2016
A reinvestigation of the roots of Strychnos icaja resulted in the isolation of a new bisindole alkaloid named strychnobaillonine (1) with original C-17–N-1′ and C-23–C-17′ junctions, in addition to sungucine, bisnordihydrotoxiferine, and strychnohexamine
Georges Dive (1816540), Olivia Jansen (1816531), Jean-Noel Nyemb (1816543), Luc Angenot (1816537), Michel Frédérich (1523242), Monique Tits (1816534), Alembert T. Tchinda (709823)   +6 more
core   +1 more source

Biscarpamontamines A and B, an Aspidosperma−Iboga Bisindole Alkaloid and an Aspidosperma−Aspidosperma Bisindole Alkaloid, from Tabernaemontana sphaerocarpa

, 2016
Two new bisindole alkaloids, biscarpamontamine A (1), possessing an aspidosperma−iboga-type skeleton, and biscarpamontamine B (2), having an aspidosperma−aspidosperma-type skeleton, were isolated from stems of Tabernaemontana sphaerocarpa, and their ...
Motoo Shiro (1670407), Idha Kusumawati (2330938), Hiroshi Morita (124362), Yusuke Hirasawa (1562092), Kazumasa Zaima (2290759), Noor Cholies Zaini (2330935), Tomoko Hirata (843960), Abdul Rahman (730178), Takahiro Hosoya (124351), Koichiro Koyama (2265847)   +9 more
core   +2 more sources

Synthesis and Assignment of the Absolute Configuration of Indenotryptoline Bisindole Alkaloid BE-54017

, 2016
Synthesis of the indenotryptoline bisindole alkaloid, BE-54017, was accomplished using osmium-promoted cis-dihydroxylation of maleimide as a key step. After optical resolution, the absolute configuration of this molecule was determined by comparing its ...
Tomoyuki Kimura (1896370), Yusuke Matsui (2047393), Masaya Imoto (263248), Shuhei Kanagaki (2047390), Takumi Watanabe (704540), Masakatsu Shibasaki (704542)   +5 more
core   +1 more source

Synthesis of Topsentin‐A, A Bisindole Alkaloid of the Marine Sponge Topsentia genitrix

Bulletin des Sociétés Chimiques Belges, 1987
AbstractThe synthesis of topsentin‐A, a bisindole alkaloid isolated from the maring sponge Topsentia genitrix, has been achieved starting from 3‐acetylindole.
Braekman, Jean Claude, Daloze, Désiré, Stoller, Catherine   +2 more
openaire   +3 more sources

Cytotoxic Bisindole Alkaloids from a Marine Sponge Spongosorites sp.

, 2016
Three new bisindole alkaloids of the hamacanthin class (1−3) and one new bisindole alkaloid of the topsentin class (6) were isolated along with known bisindole alkaloids (4, 5, 7−11) from the MeOH extract of a marine sponge Spongosorites sp.
Qishi Sun (2681866), Chong-O. Lee (2653201), Jee H. Jung (1476031), Kwang Sik Im (2653198), Chung Ja Sim (1267860), Xinsheng Yao (374401), Baoquan Bao (2390020), Jongki Hong (1476028)   +7 more
core   +1 more source

Effect and Structure-Activity Relationship Between Isatin and its Dimer Indirubin on Neural Development of Transgenic Zebrafish

Natural Product Communications
Objective Isatin (2,3-indolinedione, ISA), as an indole oxide, is widely distributed in mammalian tissues and fluids, with concentrations varying from less than 0.1 to greater than 10 μM. Indirubin (2-(2-oxo-1h-indol-3-ylidene)-1h-indol-3-one, IND), as a
Yonghua Liu, Ke Zhou, Peida Feng, Chenli Xu, Jiayu Zhou, Chengniu Wang, Xiaofang Tan, Ying Chen   +7 more
doaj   +1 more source

Bisindole alkaloids

, 2006
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 ...
Choo, Yeun Mun, Kam, Toh Seok
core   +1 more source

Cathagines A–D, new bisindole alkaloids from Catharanthus roseus

Journal of Natural Medicines
Four new bisindole alkaloids, cathagines A (1)-D (4) consisting of an aspidosperma and the fused tetracyclic 3-spirooxindole derived from an iboga type skeleton were isolated from the whole plant of Catharanthus roseus. The structures including absolute stereochemistry were elucidated on the basis of 2D NMR data and CD spectra.
Yusuke, Hirasawa, Chiaki, Kasagi, Erika, Koyama, Hitomi, Myojin, Takahiro, Tougan, Toshihiro, Horii, Nahoko, Uchiyama, Toshio, Kaneda, Hiroshi, Morita   +8 more
openaire   +2 more sources

Angustifonines A and B, Cytotoxic Bisindole Alkaloids from Bousigonia angustifolia

, 2016
Two new bisindole alkaloids, angustifonines A (1) and B (2), comprising the union of a rearranged monoterpenoid quinoline and an aspidospermine alkaloid, as well as 27 known indole alkaloids were isolated from the twigs and leaves of Bousigonia ...
Yu Zhang (12946), Shun-lin Li (1854142), Xiao-jiang Hao (1854148), Yan-hui Fu (1854145), Ying-tong Di (1854151), Hong-ping He (1854139)   +5 more
core   +1 more source

Ajmaline, Oxindole, and Cytotoxic Macroline–Akuammiline Bisindole Alkaloids from Alstonia penangiana

, 2018
Examination of the EtOH extract of the Malayan Alstonia penangiana resulted in the isolation of 10 new alkaloids, comprising two ajmaline (1, 2), four macroline oxindole (3–6), and four macroline–akuammiline bisindole alkaloids (7–10).
Suerialoasan Navanesan (785142), Kien-Thai Yong (4446481), Joanne Soon-Yee Yeap (5205269), Yun-Yee Low (1426531), Kae-Shin Sim (666138), Toh-Seok Kam (1426537), Subramaniam Gurusamy (5205272), Siew-Huah Lim (1426534)   +7 more
core   +1 more source