Maytenus salicifolia : triterpenes isolated from stems and antioxidant property of extracts from aerial parts.

• Autor(a) principal: Magalhães, Cássia Gonçalves
• Data de Publicação: 2011
• Outros Autores: Ferrari, Fernanda Cristina, Guimarães, Dênia Antunes Saúde, Silva, Grácia Divina de Fátima, Duarte, Lucienir Pains, Figueiredo, Rute Cunha, Vieira Filho, Sidney Augusto
• Idioma: eng
• Título da fonte: Repositório Institucional da UFOP
• dARK ID: ark:/61566/001300000btmr
• Texto Completo: http://www.repositorio.ufop.br/handle/123456789/3858; http://dx.doi.org/10.1590/S0102-695X2011005000039
• topic: Maytenus salicifolia; Celastraceae; Pentacyclic triterpenes; Antioxidant property

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.