The atom nomenclature used throughout this study is shown in Figure . Both MMG analogs consist of a 1:1 racemic mixture of two corynomycolic acid variants. The MMG-1 mixture has a (2R,3S) and a (2S,3R) configuration of the lipid acid moiety (Figure ). The corresponding stereochemistry in MMG-6 is (2R,3R) and (2S,3S) (Figure ).