Antibiotic 5057B substance
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United States of America Patent
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Dec 11, 1984
Grant Date -
N/A
app pub date -
Jul 13, 1982
filing date -
Nov 13, 1980
priority date (Note) -
Expired
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Abstract
New antibiotic 5057B and process for its preparation. Antibiotic 5057B itself is an acidic material, and its sodium salt has the following physical and chemical properties: (1) Colorless needles (2) Melting point: 143.degree.-145.degree. C. (3) Elementary analysis (Found %): C, 59.96; H, 9.03; O, 27.60; Na, 3.41 (4) Specific rotation: [.alpha.].sub.D.sup.25 =+5.5.degree. (C 1, CHCl.sub.3) (5) Maximum absorption in ultraviolet absorption spectrum: .lambda..sub.max.sup.MeOH (E.sub.1 cm.sup.1%) 290 nm (0.88) (6) Characteristic absorption (cm.sup.-1) in infrared absorption spectrum (taken with the potassium bromide tablet: 3480, 3000, 2970, 2812, 1719, 1645, 1595, 1465, 1385, 1160, 1100, 1035, 980 (7) Solubility: soluble in methanol, ethanol, ethyl acetate, chloroform, ether, acetone, and benzene and so forth; insoluble in water (8) Color reaction: positive in the 2,4-dinitrophenylhydrazine reaction; negative in the ninhydrin reaction and the vanilline-sulfuric acid reaction; colors with I.sub.2 gas. The antibiotic is prepared by culturing Streptomyces bacteria, and collecting the antibiotic from the culture product.
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