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Acetoin is used as a food flavoring (in baked goods) and a fragrance. It can be found in apples, butter, yogurt, asparagus, black currants, blackberry, wheat, broccoli, brussels sprouts, cantaloupe.he conversion of acetoin into acetyl-CoA is catalysed by the acetoin dehydrogenase complex, following a mechanism largely analogous to the pyruvate dehydrogenase complex; however, as acetoin is not a 2-oxoacid, it does not undergo decarboxylation by the E1 enzyme; instead, a molecule of acetaldehyde is released.
Niacin (also known as vitamin B3 or nicotinic acid) is an organic compound with the formula C 6H 5NO 2 and, depending on the definition used, one of the 20 to 80 essential human nutrients.iacin is found in variety of foods, including liver, chicken, beef, fish, cereal, peanuts, and legumes, and is also synthesized from tryptophan, an essential amino acid found in most forms of protein. Animal products: 1  liver, heart and kidney (9 â 15 mg niacin per 100 grams).