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References16
Newest
Published on Nov 1, 2011in Tetrahedron Letters2.26
Yoshinori Saito12
Estimated H-index: 12
(Tokushima Bunri University),
Mayu Ichihara5
Estimated H-index: 5
(Tokushima Bunri University)
+ 3 AuthorsMotoo Tori31
Estimated H-index: 31
(Tokushima Bunri University)
Five new 1 beta-angeloyloxyeremophilanolides (subspicatins H-L) and 1 beta-angeloyloxytetranoreremophilanone (norsubspicatin A), were isolated from the EtOAc extracts of Parasenecio petasitoides and their structures established on the basis of spectroscopic analyses. They are biogenetically mutually related to each other and represent a new category in the Parasenecio group. These findings suggest that there is diversity in this species, too. (C) 2011 Elsevier Ltd. All rights reserved.
Published on Mar 1, 2011in Tetrahedron2.38
Yoshinori Saito12
Estimated H-index: 12
(Tokushima Bunri University),
Masato Hattori2
Estimated H-index: 2
(Rikkyo University)
+ 11 AuthorsXun Chao2
Estimated H-index: 2
(Rikkyo University)
Root chemicals and DNA sequences were analyzed for Ligularia lamarum samples collected in Yunnan and Sichuan Provinces of China and the relationship between the plant and Ligularia subspicata, its taxonomically closest species, was examined. Both species produce furanoeremophilanes and eremophilan-8-one derivatives as the major components. Eleven new compounds, including a new seco-bakkane compound, were isolated. The two species were found to harbor overlapping intra-specific diversities with r...
Published on Sep 1, 2010in Bulletin des Sociétés Chimiques Belges
Ferdinand Bohlmann47
Estimated H-index: 47
(Technical University of Berlin),
J. Jakupovic38
Estimated H-index: 38
(Technical University of Berlin)
+ 4 AuthorsHarold Robinson35
Estimated H-index: 35
(Smithsonian Institution)
The investigation of ten further Senecio species afforded 24 new furanoeremophilanes, 18 eremophilanolides, seven seco- and two rearranged eremophilanolides, twelve bisabolone derivatives and six sesquiterpenes with new carbon skeletons which are most likely derived from the latter. Possible biogenetic pathways are discussed. Furthermore five new eremophilones, an eudesmane, four p-hydroxyacetophenone, a bis-coniferylalcohol derivative and five shikimic acid derivatives were isolated. The struct...
Published on Jan 1, 2010in Natural Product Communications0.55
Hajime Nagano16
Estimated H-index: 16
(Ochanomizu University),
Mika Matsushima4
Estimated H-index: 4
(Ochanomizu University)
+ 3 AuthorsChiaki Kuroda17
Estimated H-index: 17
(Rikkyo University)
From the roots of Ligularia oligonema and an unidentified sample of Ligularia collected in Yunnan Province of China, two new sesquiterpenoids, 3 beta-acetoxy-6 beta-(2-methylbutyryloxy)furanoereinophilan-10 beta-ol and 3 beta-acetoxy-6 beta-isobutyryloxyfuranoeremophilan-10 beta-ol, were isolated. DNA sequencing showed that the unidentified sample was likely to be L. oligonema. In addition, the DNA data suggested that the chemical evolution among L. oligonema and related Ligularia species is rat...
Published on Oct 1, 2009in Helvetica Chimica Acta1.39
Hajime Nagano16
Estimated H-index: 16
(Ochanomizu University),
Atsushi Torihata6
Estimated H-index: 6
(Rikkyo University)
+ 10 AuthorsMayu Ichihara5
Estimated H-index: 5
(Tokushima Bunri University)
Root chemicals and evolutionarily neutral DNA regions in L. cyathiceps samples collected in the Zhongdian (Shangrila) County of Yunnan, P. R. China, were examined. Twenty compounds were isolated, including three new ones, 1 beta,10 beta-epoxy-6 beta-(propionyloxy)furanoeremophilan-9-one (6), 1 beta,10 beta-epoxy-8 alpha-ethoxyeremophila-6,11-diene (14), and 11 alpha H-6 beta-isobutyryloxy-1 beta,10 beta,7 beta,8 beta-diepoxyeremophilan-12,8 alpha-olide (15). The chemical diversity was found to b...
Published on Sep 1, 2008in Tetrahedron2.38
Motoo Tori31
Estimated H-index: 31
(Tokushima Bunri University),
Yasuko Okamoto11
Estimated H-index: 11
(Tokushima Bunri University)
+ 9 AuthorsChiaki Kuroda10
Estimated H-index: 10
(Rikkyo University)
New C-1 oxidized eremophilane-type sesquiterpenoids, subspicatins A, B, C, and D, and subspicatolide, were isolated from the root of Ligularia subspicata and their structures were established by spectroscopic and X-ray analyses. Subspicatins A and B were the major components. The species were found to be diverse both in the composition of the root chemicals and in the nucleotide sequences of the internal transcribed spacers (ITS) of the ribosomal RNA gene and the atpB-rbcL intergenic region, but...
Published on Feb 25, 2008in Molecular Ecology Resources7.05
D. Lee Taylor28
Estimated H-index: 28
(UAF: University of Alaska Fairbanks),
Michael G. Booth6
Estimated H-index: 6
(UAF: University of Alaska Fairbanks)
+ 4 AuthorsThomas G. Marr6
Estimated H-index: 6
(UAF: University of Alaska Fairbanks)
High throughput sequencing methods are widely used in analyses of microbial diversity, but are generally applied to small numbers of samples, which precludes characterization of patterns of microbial diversity across space and time. We have designed a primer-tagging approach that allows pooling and subsequent sorting of numerous samples, which is directed to amplification of a region spanning the nuclear ribosomal internal transcribed spacers and partial large subunit from fungi in environmental...
Published on Jan 1, 1990
Thomas J. White32
Estimated H-index: 32
,
Thomas D. Bruns68
Estimated H-index: 68
+ 1 AuthorsJ. Taylor1
Estimated H-index: 1
Published on Jan 1, 1979in Phytochemistry2.90
Ferdinand Bohlmann47
Estimated H-index: 47
(Technical University of Berlin),
Christa Zdero37
Estimated H-index: 37
(Technical University of Berlin)
+ 3 AuthorsC. Jeffrey1
Estimated H-index: 1
(Royal Botanic Gardens)
Abstract The investigation of further 27 South African and a few other Senecio species afforded in addition to known compounds 18 new furanoeremophilanes, most of them being cacalol derivatives, two new lactones, a new eudesmane derivative and four acyl pyrrole derivatives. The structures are elucidated by spectroscopic methods mainly. The chemical results on more than 140 species now available indicate much of chemotaxonomic interest. Together with the chemical data on related genera, the taxon...
Cited By1
Newest
Published on Aug 1, 2017in Phytochemistry2.90
Yoshinori Saito12
Estimated H-index: 12
(Nagasaki University),
Mayu Ichihara5
Estimated H-index: 5
(Tokushima Bunri University)
+ 5 AuthorsMotoo Tori31
Estimated H-index: 31
(Tokushima Bunri University)
Abstract Three natural hybrids and an introgressed individual of Ligularia were evaluated based on a combination of morphology, root chemicals, and nucleotide sequences of evolutionally neutral regions to understand the chemical outcomes of hybridization and introgression. Six previously undescribed eremophilane sesquiterpenes were isolated from hybrids between L. cyathiceps and L. lamarum / L. subspicata , and benzofurans were isolated from L. subspicata for the first time. Their structures wer...
View next paperNew oplopane-type sesquiterpenoids from Ligularia duciformis