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| Branco,Alexsandro; Pinto,Angelo C.; Braz Filho,Raimundo. |
| From the hexane and ethyl acetate extracts obtained from stems, roots and leaf sheaths of Vellozia graminifolia, a mixture of linear hydrocarbons, a mixture of pentacyclic triterpenes, five monoisoprenylated flavonoids and one labdane diterpene, (-)-ent-3beta-hydroxy-8(17)-labden-15-oic acid, were isolated. The linear hydrocarbons and minor triterpenes were identified in their corresponding mixtures by High Resolution Gas Chromatography (HRGC) and HRGC coupled to mass spectrometry. The major pentacyclic triterpenes and the diterpene were characterized by spectral data, including 2D NMR experiments, and chemical transformations. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vellozia graminifolia; Velloziaceae; Triterpenes; Diterpene; Flavonoids. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300005 |
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| Metoyer, Benjamin; Lebouvier, Nicolas; Hnawia, Edouard; Herbette, Gaetan; Thouvenot, Louis; Asakawa, Yoshinori; Nour, Mohammed; Raharivelomanana, Phila. |
| Volatile components of seven species of the Bazzanioideae sub-family (Lepidoziaceae) native to New Caledonia, including three endemic species (Bazzania marginata, Acromastigum caledonicum and A. tenax), were analyzed by GC-FID-MS in order to index these plants to known or new chemotypes. Detected volatile constituents in studied species were constituted mainly by sesquiterpene, as well as diterpene compounds. All so-established compositions cannot successfully index some of them to known chemotypes but afforded the discovery of new chemotypes such as cuparane/fusicoccane. The major component of B. francana was isolated and characterized as a new zierane-type sesquiterpene called ziera-12(13), 10(14)-dien-5-ol (23). In addition, qualitative intraspecies... |
| Tipo: Text |
Palavras-chave: Liverwort; Bazzania; Acromastigum; Sesquiterpene; Diterpene; Bis(bibenzyl); Biosynthesis; Zierane; Vittatin. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00660/77222/78670.pdf |
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