Labdane diterpenes from the marine pulmonate gastropod Trimusculus peruvianus
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Five new labdane diterpenes from Aster oharai.
Five new labdane diterpenes (1-5) together with seven known diterpenes have been isolated from a methanol extract of the aerial parts of Aster oharai. Five new structures were determined as 7alpha-hydroperoxylabda-8(17),14-dien-13(R)-ol-4-O-acetyl-alpha-L-6-deoxyidopyranoside (1), 7alpha-hydroperoxylabda-8,14-dien-13(R)-ol-4-O-acetyl-alpha-L-6-deoxyidopyranoside (2), labda-7,14-dien-13(R)-ol-4-...
متن کاملLabdane Diterpenes from the Fruits of Sinopodophyllum emodi.
Two new labdane diterpenes, sinoditerpene A (1) and B (2), were isolated from the fruits of Sinopodophyllum emodi, along with two known analogues 3 and 4. Their structures were established on the basis of extensive spectroscopic analysis. The isolation of compounds 1-4 represents the first report of diterpenes from the genus Sinopodophyllum. The cytotoxic activities of all isolated compounds we...
متن کاملCytotoxic Labdane Diterpenes from Hedychium ellipticum Buch.-Ham. ex Sm.
In order to reveal the constituents and their biological activities, we carried out a phytochemical study on Hedychium ellipticum Buch.-Ham. ex Sm. (Zingiberaceae). Ten labdane diterpenoids (1-10) were isolated from the rhizomes of H. ellipticum for the first time. Their structures were identified on the basis of spectroscopic analyses including two-dimensional NMR and comparison with literatur...
متن کاملDimeric labdane diterpenes: synthesis and antiproliferative effects.
Several diterpenes with the labdane skeleton show biological activity, including antiproliferative effects. Most of the research work on bioactive labdanes has been carried out on naturally occurring diterpenes and semisynthetic derivatives, but much less is known on the effects of diterpene dimers. The aim of the present work was to synthesize dimeric diterpenes from the labdane imbricatolic a...
متن کاملA modular approach for facile biosynthesis of labdane-related diterpenes.
Labdane-related diterpenoids are a large group of over 5,000 natural products whose biosynthesis typically proceeds through a labdadienyl/copalyl diphosphate (CPP) intermediate to a further cyclized and/or rearranged hydrocarbon diterpene en route to more elaborated compounds. Here we report a modular approach for facile biosynthesis of labdane-related diterpenes wherein base pGGxC vectors capa...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1996
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v96-276