Gallic acid as main product in the water extractives of Quercus frainetto ten

Abstract

The autoclave extraction of Hungarian oak (Quercus frainetto Ten.) wood gave 5.3% extractives. The chloroform soluble fraction obtained from the extracts of Q. frainetto allows to identify sesamin. The insoluble fraction contains mainly ribose and mannose. Water extraction in autoclave of thermo-treated Q. frainetto wood gave a lower amount of extractives (3.31%). The main product of the insoluble fraction was, on the basis of its mass spectrum, the monoacetyl derivative of gallic acid.

Graphical Abstract

Keywords:

• Quercus frainetto
• thermo-treated wood
• extractives

Disclosure statement

No potential conflict of interest was reported by the authors.