Výsledky vyhledávání - "R. N. Baruah"

Further sesquiterpene lactones from Calea and Viguiera species

Autor: Ferdinand Bohlmann, R. N. Baruah, Guillermo Schmeda-Hirschmann, Christa Zdero

Publikováno v: Phytochemistry. 24:2019-2022

The aerial parts of Calea clematidea gave three new germacranolides, those of Viguiera procumbens two orizabin derivatives and those of V. linearis dihydrobudlein A. In addition to these lactones, several known ones were isolated.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12852f6987a037a7d2be9caee1d70e38
https://doi.org/10.1016/s0031-9422(00)83114-3

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Some sesqui- and diterpenes from the tribe eupatorieae

Autor: Robert M. King, Ferdinand Bohlmann, Harold Robinson, Christa Zdero, R. N. Baruah

Publikováno v: Phytochemistry. 24:2641-2644

The aerial parts of Trichogonia salviaefolia afforded a new ent -kaurenic acid derivative and a germacranolide which, most likely, is the precursor of the trichosalviolides. The aerial parts of Liatris spicata gave 1α-hydroxybacchotricuneatin A and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::335bc774db1772aae086f2ade0bd7428
https://doi.org/10.1016/s0031-9422(00)80685-8

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Further diterpenes from plants of the compositae, subtribe solidagininae

Autor: F. Eid, Ferdinand Bohlmann, V.P. Pathak, T.V. Chau-Thi, Harold Robinson, Jasmin Jakupovic, R. N. Baruah, Christa Zdero, Robert M. King

Publikováno v: Phytochemistry. 25:1873-1881

Six new ent -labdanes were isolated from the aerial parts of Gutierrezia species and nine from Happlopappus pectinatus . Four neoclerodanes and a friedolabdane were obtained from the aerial parts of Haplopappus paucidentatus . From the Grindelia spec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ffe7101f72cd65d53c233b2ca600799
https://doi.org/10.1016/s0031-9422(00)81166-8

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New 5-methylcoumarins from Ethulia conyzoides

Autor: R. N. Baruah, Narendra Kumar, Vishnu S. Shukla, Ram P. Sharma, John F. Blount, Gopalakrishna Thyagarajan, Kinzo Watanabe, Werner Herz, Subhash C. Dutta

Publikováno v: Phytochemistry. 21:1725-1731

The isolation of three new terpenoid 5-methylcoumarins in the form of diastereomeric mixtures from a north Indian collection of Ethulia conyzoides is reported. Stereochemistries were deduced by X-ray analysis of a pure acetate isomer obtained on acet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8043cc0c3d917b2908c05746c0f7217
https://doi.org/10.1016/s0031-9422(82)85048-6

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Germacranolides from Inula cappa

Autor: Jogendra N. Baruah, Ram Prakash Sharma, Aboni C. Goswami, Palaniappan Kulanthaivel, Werner Herz, R. N. Baruah

Publikováno v: Phytochemistry. 23:367-372

Authentic Inula cappa DC afforded a known and four unknown germacranolides related to the ineupatorolides as well as a new 2,3-dihydroxy-9-angeloxygermacra-4-en-6,12-olide. A collection previously described as Inula cappa which yielded only flavones

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::259aac678903d916da6ddb8a8acc82f5
https://doi.org/10.1016/s0031-9422(00)80334-9

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New alicyclic diterpenes and ent-labdanes from gutierrezia solbrigii

Autor: Harold Robinson, Robert M. King, Jasmin Jakupovic, Ferdinand Bohlmann, R. N. Baruah

Publikováno v: Tetrahedron. 41:4537-4544

The investigation of the aerial parts of Gutierrezia solbrigii afforded in addition to known compounds nine new ent-labdane derivatives, an aromatic ester and five alicyclic diterpenes. The structures were elucidated by highfield 1H NMR spectroscopy.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b59c8ed50e6154546d85aaa092e75a4f
https://doi.org/10.1016/s0040-4020(01)82348-6

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