Salicilatos isolados de folhas e talos de Salix martiana Leyb. (Salicaceae)

Fernandes, Carromberth Carioca, Cursino, Lorena Mayara de Carvalho, Novaes, Jussival de Abreu Pinheiro, Demetrio, Camilla Avelino, Pereira Júnior, Orlando Libório, Nunez, Cecília Verônica, Amaral, Iêda Leão do

Salicilatos isolados de folhas e talos de Salix martiana Leyb. (Salicaceae)

AUTOR(ES)

Fernandes, Carromberth Carioca, Cursino, Lorena Mayara de Carvalho, Novaes, Jussival de Abreu Pinheiro, Demetrio, Camilla Avelino, Pereira Júnior, Orlando Libório, Nunez, Cecília Verônica, Amaral, Iêda Leão do

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2009

RESUMO

Salix martiana Leyb. is an endemic species from the Amazon river floodplain areas (varzeas), of the State of Amazonas. Stems and leaves were extracted with dichloromethane, methanol and hydro-alcohol and these extracts were fractionated by using conventional chromatographic techniques. The major substances isolated, salicin and trichocarposide (6-0-p-coumaroyl salicin), were determined through analyses of NMR 1D (¹H and 13C) and NMR 2D (gHSQC and gHMBC). These compounds were isolated for the first time in Salix martiana Leyb. (Salicaceae). The percentage of these compounds in S. martiana is very high. The extracts were analyzed for their DPPH antioxidant capacity and the methanolic from the leaves and the hydro-alcoholic from the stems were the more active.