A New Natural Naphthoquinone in Mycobacterium phlei

Abstract

The natural quinone, II-dihydromenaqulnone-9 (M&(11-H)), from Mycobacferium #Mei has been resolved into two components by adsorption thin layer chromatography.Chemical analysis of the separated products indicated that they were both 1,4-naphthoquinones of the MKe(II-H) type, differing only in the geometry of the double bond in the ring-terminal isoprene unit.By nuclear magnetic resonance spectroscopy it was possible to show that the major component was all-trans-M&@-H),