<unk>  (LA), also known as α-lipoic<unk>  and alpha<unk>  (ALA) and thioctic<unk>  is an organosulfur compound derived from octanoic<unk> .  ALA is made in animals normally, and is essential for aerobic metabolism.  It is also manufactured and is available as a dietary supplement in some countries where it is marketed as an antioxidant, and is available as a pharmaceutical drug in other countries.
Lipoic acid
Hemin
Cholic acid
Hemocyanin
Phospholipid
Lecithin
Beta-carotene
Azelaic acid