The molecule is a mycolic acid produced by Mycobacterium tuberculosis. Its structure is that of hexacosanoic acid substituted at position 2 by a (1R,18Z,33Z)-1-hydroxytetrapentaconta-18,33-dien-1-yl group. (The term C80 refers to the average tail length of a reported naturally occurring range of 72-86 carbon atoms.)
(2R,3R,20Z,35Z)-3-hydroxy-2-tetracosylhexapentaconta-20,35-dienoic acid