The molecule is the conjugate base of methoxymycolic acid type-3 (IX). A class of mycolic acids characterized by the presence of a proximal cis C=C double bond and a distal (CH-CH3)-(CHO-CH3) fragment of (S,S) stereochemistry in the meromycolic chain.
(Z,2R,3R,8S,9S)-2-ethyl-3-hydroxy-8-methoxy-9-methylundec-5-enoate