Salicilatos isolados de folhas e talos de salix martiana leyb. (salicaceae)

Abstract

Salix martiana Leyb. is an endemic species from the Amazon river floodplain areas (varzeas), of the state or Amazonas, stems ana 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 ID (1H and 13C) and NMR 2D (gHSQC and gHMBC). These compound 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.