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1. (Article ID: 10442)
 
Kinjo J, Araki K, Fukui K, Higuchi H, Ikeda T, Nohara T, Ida Y, Takemoto N, Miyakoshi M, Shoji J
Six new triterpenoidal glycosides including two new sapogenols from Albizziae Cortex. V
Chemical and Pharmaceutical Bulletin 40(12) (1992) 3269-3273
 

Six new triterpenoid glycosides called julibrosides A1-A4,B1 and C1 were isolated from Albizziae Cortex, the dried stem bark of Albizzia julibrissin DURAZZ. Their structures were determined based on spectral and chemical evidence. Julibrosides B1 and C1 had new sapogenols, designated julibrogenin B and C, respectively, while julibrosides A3 included N-acetyl-D-glucosamine as a sugar component.

N-acetyl-d-glucosamine, Leguminosae, oleanene glycoside, Albizziae Cortex, Albizzia julibrissin, oleanene sapogenol, julibrogenin, julibroside

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2. (Article ID: 10975)
 
Jia Z, Koike K, Nikaido T, Ohmoto T
Two novel triterpenoid pentasaccharides with an unusual glycosyl glycerol side chain from Ardisia crenata
Tetrahedron 50 (1994) 11853-11864
 

Two novel triterpenoid pentasaccharides, ardisicrenosides E and F, were isolated from the roots of Ardisia crenata. They are the first examples of a triterpenoid glycoside hybridized with a glycosyl glycerol. Their structures were mainly established on the basis of high field NMR studies. In addition, molecular mechanics and dynamics calculation studies showed that the lack of 13C glycosylation shifts in the Rhamα1→2G′lcβ and G′lcβ1→4Araα fragments in ardisicrenoids E could be correlated with the distortion of the corresponding torsion angles. Both compounds exhibited moderate inhibitory activity on cAMP phosphodiesterase.

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3. (Article ID: 10977)
 
Habermehl GG
Poisonous plants of Brazil
Toxicon 32 (1994) 143-156
 

Poisonous plants are a serious problem for cattle breeding in Latin America. Owing to the extensive pastural agriculture it is not possible to exterminate such plants. Apart from the considerable financial loss to individual farmers and the national economy owing to dead animals, there is the important question of how far the meat and milk of chronically poisoned animals are a health risk for humans. The toxins of the most important toxic plants from Brazil are described.

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