Chemical constituents from Vellozia graminifolia (Velloziaceae)
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چکیده
منابع مشابه
A New Isopimarane Diterpenoid from Vellozia pusilla Pohl (Velloziaceae)
The Velloziaceae is a family of tropical plants occurring in South America and Africa. The Brazilian species occur in the subtropical regions, especially in the states of Minas Gerais, Bahia, Goiás, Mato Grosso, Rio de Janeiro and Santa Catarina. These plants grow in a characteristic ecosystem fully exposed on mountainsides in rocky or sandy soils. Plants of the family Velloziaceae in spite of ...
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Do extrato etéreo das folhas de Vellozia candida Mikan (Velloziaceae) foram isolados os flavonóis 3',4',5,7-tetraidroxi-3,6-dimetoxi-8-metilflavona e 3’,4’,5-triidroxi-3,6,7-trimetoxi-8-metilflavona. Estes compostos foram identificados através de seus dados espectrais, incluindo RMN 2D e EMEM. O derivado 5-hidroxi-3,3’,4’,6,7-pentametoxi-8-metilflavona foi obtido por metilação usando diazometano.
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UNLABELLED • PREMISE OF THE STUDY We developed and validated microsatellite primers for Vellozia squamata (Velloziaceae), an endemic species of the cerrado (Brazilian savannas), to investigate the influence of different fire regimes on its genetic diversity and population structure. • METHODS AND RESULTS Using a selective hybridization method, we tested 51 SSR loci using a natural populatio...
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Vellozia gigantea is a rare, ancient, and endemic neotropical plant present in the Brazilian Rupestrian grasslands. The dichloromethane extract of V. gigantea adventitious roots was phytotoxic against Lactuca sativa, Agrostis stolonifera, and Lemna paucicostata, and showed larvicidal activity against Aedes aegypti. Phytotoxicity bioassay-directed fractionation of the extract revealed one new is...
متن کاملChemical Constituents from Euphorbia kansui.
In this research, a new triterpenoid, tirucalla-8,24-diene-3β,11β-diol-7-one (1), and eupha-8,24-diene-3β,11β-diol-7-one (2), which was isolated from Euphorbia kansui for the first time, together with twelve other known compounds (3-14), were isolated from the ethyl acetate extract of Euphorbia kansui. Their structures were elucidated based on High resolution electrospray ionization mass spectr...
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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2004
ISSN: 0001-3765
DOI: 10.1590/s0001-37652004000300005