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Diacyl phthiodiolone A and phenolphthiodiolone A lipids were isolated from two strains of Mycobacterium ulcerans. The diol units of the phthiodiolone A and phenolphthiodiolone A components were shown to have erythro stereochemistry by infrared spectroscopy and proton nuclear magnetic resonance of an acetal derivative. This stereochemistry is shared only by related diols from M. marinum, the diols from M. bovis, M. kansasii, M. leprae and M. tuberculosis having threo stereochemistry.
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Besra et al. (1990) studied this question.
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