The molecule is the conjugate base of methoxymycolic acid type-1 (VI). A class of mycolic acids characterized by the presence of a proximal cis-cyclopropyl group and a distal (CH-CH3)-(CHO-CH3) fragment of (S,S) stereochemistry in the meromycolic chain.
(2R,3R)-2-ethyl-3-hydroxy-4-[2-[(2S,3S)-2-methoxy-3-methylpentyl]cyclopropyl]butanoate