title: Production of a novel red pigment, rubrolone, by Streptomyces echinoruber Sp. Nov. II. Chemistry and structure elucidation.
abstract: Streptomyces echinoruber sp. nov. produces several red pigments. The major component, rubrolone, has been identified as 8(R),9(R),10(S),10a(R)-tetrahydro-9,10,10a,11-tetrahydroxy-3,8-dimethyl-1-propyl-6aH(S)-pyrano[2",3":5',4]furo[2',3':5,6]azuleno[2,3-c]pyridine-5,13-dione (1) by single crystal X-ray analysis of a suitable derivative. A second pigment, B, is probably structurally closely related.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D005285:Fermentation; D008958:Models, Molecular; D010084:Oxidation-Reduction; D010860:Pigments, Biological / Q000096:biosynthesis; D013302:Streptomyces / Q000378:metabolism; D014961:X-Ray Diffraction
chemical_list: D010860:Pigments, Biological