Andy Brunning, a chemistry teacher from the United Kingdom, runs a blog called Compound Interest. Basically he creates graphics which look at chemistry and chemical reactions that impact our daily lives.
Andy’s chart reviews the distillation process and then looks at the main compounds that impart whiskies flavor. There are actually 100’s of different compounds, so just the main ones are covered in the chart.
These include lactones, which are found in the oak barrels, and give whiskey its woody flavor, to esters which impart fruity flavors.