Fatty Acid Esters of Triterpenes from Erythroxylum passerinum

Barreiros, Marizeth L.; David, Jorge; Pereira, Pedro Afonso de Paula; Guédès, Michel; David, Juceni P.

doi:10.1590/s0103-50532002000500021

Cited by 42 publications

(20 citation statements)

References 11 publications

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“…As a result, it was also suggested that the compound described as 11a-hydroxy-b-amyrin, isolated from Stauntonia hexaphylla callus (Ikuta and Morikawa, 1992) must also be a 11b-hydroxy derivative, since its C-11 carbon (Yuan et al, 1994). Therefore, the 11-hydroxy-b-amyrin fatty acid ester isolated from Erythroxylum passerinum (Barreiros et al, 2002) must be the 11a-hydroxy derivative instead of the 11b-epimer, as deduced by comparison with the compound isolated by Ikuta and Morikawa (1992). However, the above conclusion seems to be in disagreement with the large J 9,11 value (9.4 Hz) for the reported 11b-derivatives from P. kleinii (Lima et al, 2005), although, this fact could have an explanation if the dihedral angle between H-11 and H-9 has values close to 0°i n the C-11b-hydroxy derivatives.…”

Section: Resultsmentioning

confidence: 99%

21β-Hydroxy-oleanane-type triterpenes from Hippocratea excelsa

2008

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Section: Resultsmentioning

confidence: 99%

21β-Hydroxy-oleanane-type triterpenes from Hippocratea excelsa

2008

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“…All the three most commonly consumed plants belong to families known to contain toxins. For example, several of the c. 250 species of the genus Erythroxylum investigated for chemical composition contained alkaloids and terpenes, especially triterpenes in the leaves and fruits (Zuanazzi et al, 2001;Barreiros et al, 2002). Triterpenes are also found in M. obtusifolia (Alves et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

How much fruit do fruit‐eating frogs eat? An investigation on the diet of Xenohyla truncata (Lissamphibia: Anura: Hylidae)

Silva

Britto-Pereira

2006

Journal of Zoology

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This paper presents the results of a 22-month survey and the examination of the intestinal content of 356 specimens of Xenohyla truncata (Anura: Hylidae) from Restinga de Maric´a, Rio de Janeiro, Brazil. Our results confirm prior observations that fruits are intrinsic to the diet of these frogs. In addition, these new data increase our understanding of the relationship between frogs and the plants they feed upon. Plant consumption follows availability of fruits in the area, indicating that the diversity of fruits consumed by the frogs does not represent choice, but rather plant phenology and fruit availability.

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“…[16][17][18] Different partitionates i.e. petroleum ether (PESF), dichloromethane (DCMSF), chloroform (CSF) and aqueous soluble fractions (AQSF) were tested for brine shrimp lethality according to the procedure of Meyer et al 13 .…”

Section: β-Sitosterolmentioning

confidence: 99%

Chemical and Biological Studies of Leaf Extract of Dendrophthoe falcata Linn.

Rafe

Ahsan

Hasan

et al. 2018

Dhaka Univ. J. Pharm. Sci

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Dendrophthoe falcata (Family Loranthaceae) is used extensively in rural area as a component of ethno-medicine for the treatment of various diseases. In this study, the crude extracts and the fractions obtained from D. falcata were investigated for potential chemical constituents and some biological activities. For medicinal properties the antioxidant, brine shrimp lethality and thrombolytic activities have been investigated. The structures of the isolated three compounds were solved by extensive analyses of their high resolution 1 HNMR spectroscopic data. They were identified as Lupeol, 3-β-acetoxy-12-ene-11-one and β-sitosterol. For bioactivities, the petroleum ether, dichloromethane, chloroform and aqueous soluble fractions abbreviated as PESF, DCMSF, CSF and AQSF respectively. Brine shrimp lethality bioassay was used to evaluate potential cytotoxic activities, where all fractions showed significant activity with lower LC50. Most significant activity has been observed for methanol extract (LC50= 4.477 g/ml). AQSF revealed maximum activity in DPPH free radical scavenging assay (IC50 = of 43.49 μg/ml). In assay for thrombolytic activity, the methanol extract and its chloroform soluble fraction demonstrated significant efficacy with 32.65% and 32.36% clot lysis, respectively.

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Fatty Acid Esters of Triterpenes from Erythroxylum passerinum

Cited by 42 publications

References 11 publications

21β-Hydroxy-oleanane-type triterpenes from Hippocratea excelsa

21β-Hydroxy-oleanane-type triterpenes from Hippocratea excelsa

How much fruit do fruit‐eating frogs eat? An investigation on the diet of Xenohyla truncata (Lissamphibia: Anura: Hylidae)

Chemical and Biological Studies of Leaf Extract of Dendrophthoe falcata Linn.

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