Straight chain heptane burns very rapidly and is given an octane rating of zero. A mixture of 87 percent branched isomer of octane and 13 percent heptane would have an octane rating of 87. Performance will not be improved by using a higher octane in a tuned automobile engine that does not ping or knock with 87 octane gasoline. If the hydrocarbon group in ROH is ethyl, for example, the alcohol is called ethyl alcohol. Amyl acetate, for example, is the chemical responsible for what you identify as the flavor of banana.
Natural flavors are complex mixtures of esters along with other organic compounds.
Starches are complex carbohydrates known as polysaccharides, which are polymers made up of simpler monosaccharide units joined together in straight or branched chains. The human digestive process breaks these polymers apart into the basic monosaccharide units. Monosaccharides serve as food and are also known as simple sugars because they are mostly 6-carbon molecules such as glucose. Glucose is found in the sap of plants and in the human bloodstream where it is called blood sugar. All sugars and starches are broken down to glucose, which is transported by the blood stream for use by the body.