BARTLETT PEAR UNSATURATED ETHYL DECANOATES AND C-9 COMPOUNDS AMONG COMPONENTS CHARACTERIZING CV CATALAN-ROXO GRAPE MARC DISTILLATES

Catalan roxo marc distillates contain compounds at an unusual level in a grape derivate. The most peculiar are several unsaturated ethyl dec anoates typical of Bartlett pear distillates and derived from ethyl es ters found in the grape skins, some of which partially modified in the stereoisomery probably by the fermentation process. Remarkable compou nds are unbranched aliphatic C-9 compounds at different oxidation stat e as well as ethyl nonanoate. At sensorially interesting levels methyl and ethyl salicylate and ethyl cinnamate, monoterpenols typical of fl oral-like varieties, vitispiranes and 4-ethylguaiacol are detected. Me thyl salicylate is found in the berry as free and bound compound as se veral monoterpenols.