title: Naturally occurring isomers of a bacterial menaquinone.
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002845:Chromatography; D009682:Magnetic Resonance Spectroscopy; D009161:Mycobacterium / Q000032:analysis*; D011809:Quinones; D013057:Spectrum Analysis; D014812:Vitamin K / Q000032:analysis*
chemical_list: D011809:Quinones; D014812:Vitamin K