The molecule is the conjugate base of alpha-mycolic acid type-1 (II). A class of mycolic acids characterized by the presence of a proximal trans and a distal cis cyclopropyl group in the meromycolic chain.
(2R,3R)-2-ethyl-4-[2-[1-(2-ethylcyclopropyl)propan-2-yl]cyclopropyl]-3-hydroxybutanoate