摘要:
Substances having respectively an elemental analysis of C:55.11%; H:5.74%, a molecular weight of 864-958 a melting point of 180+/-3 DEG C (decomp); an elemental analysis of C:54.20%; H:6.15%, a molecular weight of 826-1004 and a melting point of 193-194 DEG C (decomp); and an elemental analysis of C:54.34%, H:6.03%, a molecular weight of 822-960 and a melting point of 181-182 DEG C (decomp), have been found to possess antibiotic activity. These substances have been prepared by culturing microorganisms of the genus Streptomyces. A preferred strain is Streptomyces ochraceus DC-45 (FERM-P No. 5219 NRRL 12051). The substances have a pale yellow colour, have activity against Bacillus subtilis No. 10707 and are soluble in methanol, ethanol and chloroform and insoluble in n-hexane. These substances are of potential interest as medicaments for use against bacteria such as Bacillus subtilis No. 10707 and for use as anti-tumour agents.
摘要:
Substances having respectively an elemental analysis of C:55.11%; H:5.74%, a molecular weight of 864-958 a melting point of 180±3°C (decomp); an elemental analysis of C:54.20%; H:6.15%, a molecular weight of 826-1004 and a melting point of 193-194°C (decomp); and an elemental analysis of C:54.34%, H:6.03%, a molecular weight of 822-960 and a melting point of 181-182°C (decomp), have been found to possess antibiotic activity. These substances have been prepared by culturing microorganisms of the genus Streptomyces. A preferred strain is Streptomyces ochraceus DC-45 (FERM-P No. 5219 NRRL 12051). The substances have a pale yellowish colour, have activity against Bacillus subtilis No. 10707 and are soluble in methanol, ethanol and chloroform and insoluble in n-hexane. These substances are of potential interest as medicaments for use against bacteria such as Bacillus subtilis No.10707 and for use as anti-tumour agents.
摘要:
Antibacterial tetronolide compounds F-1 and F-2 are produced by fermentation of a microorganism belonging to the genus Micromonospora. The antibiotics F-1 and F-2 are accumulated in the culture liquor and are isolated therefrom, respectively. The acyl derivatives of F-1 and F-2, that is F-1-21-0 acetate, F-1-21-0 propionate, F-1-21-0-n butylate, F-1 diacetate, F-1 dipropionate, F-2 triacetate, F-2 tripropionate and F-2 tri-n-butylate, etc., are chemically synthesized from F-1 and F-2, respectively (Fig. 1). Their formula : wherein R 1 and R 2 may be the same or different substituents and represent a hydrogen atom or an acyl group and R 3 represents a hydrogen atom, an acyl group or a tetronitrose represented by the formula (2) and the pharmaceutically acceptable salts thereof.