Final answer:
Flavonoids are a class of compounds found in plants and are not responsible for hangover symptoms. They contribute to the taste and color of certain alcoholic beverages.
Step-by-step explanation:
An alcohol is an organic compound with a hydroxyl (OH) functional group on an aliphatic carbon atom. Because OH is the functional group of all alcohols, we often represent alcohols by the general formula ROH, where R is an alkyl group. Flavonoids are a class of compounds found in plants, including some alcoholic beverages. They are not responsible for hangover symptoms, but rather contribute to the taste and color of certain drinks such as wine and beer.