Vinegar is h2o and Acetic Acid. The leading Part of the Acetic Acid could be the Acetyl Molecule.Acetobacter would be the bacteria that converts Liquor into Acetic Acid (Vinegar) which can be ubiquitous. Just leave a wine bottle lying around for 2 weeks and Acetobacter will discover it quickly and convert it into wine vinegar. Acetobacter is On top