Maytenus salicifolia : triterpenes isolated from stems and antioxidant property of extracts from aerial parts.
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2011
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Resumo
Six pentacyclic triterpenes were isolated from hexane extract of stems of Maytenus salicifolia Reissek, Celastraceae: 30-hydroxyfriedelan-3-one (1), 3,16-dioxofriedelane (2), friedeline (3), lupeol (4), betuline (5) and lup-20(29)-
en-3,30-diol (6). The structure each one was established on the basis of detailed
1H and 13C NMR spectral investigation and by comparison with the respective literature values. For compound 1, the complete 2D NMR (HMBC, HMQC and NOESY) spectral data were herein reported for the first time. Compounds 1, 2, 5 and 6 were isolated for the first time from this plant. Antioxidant activity
is described for some extracts from species of the Celastraceae family, then, the extracts from aerial parts of M. salicifolia were evaluated in relation to antioxidant potential using the DPPH method. Compared to quecertin, the AcEt extract (EAF) from leaves, AcEt (EAPF) and MeOH (EMPF) from pulp fruit and AcEt (EAT) and MeOH (EMT) from stems showed significant antioxidant property.
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Maytenus salicifolia, Celastraceae, Pentacyclic triterpenes, Antioxidant property
Citação
MAGALHÃES, C. G. et al. Maytenus salicifolia : triterpenes isolated from stems and antioxidant property of extracts from aerial parts. Revista Brasileira de Farmacognosia, v. 21, p. 415-419, 2011. Disponível em: <http://www.scielo.br/scielo.php?pid=S0102-695X2011005000039&script=sci_arttext>. Acesso em: 20 ago. 2014.