发明授权
US4304861A Process of producing antibiotic SM-173B with Streptomyces chromofuscus 失效
生产抗生素SM-173B与链霉菌(Streptomyces chromofuscus)的方法

Process of producing antibiotic SM-173B with Streptomyces chromofuscus
摘要:
A novel antibiotic having the ascribed formula ##STR1## is provided. They physical characteristics are as follows: (a) Elementary analysis: Calculated (for C.sub.20 H.sub.16 O.sub.7): C,65.22; H,4.35%. Found: C,64.60; H,4.34%.(b) Molecular weight (mass-spectrometric): 368.(c) Melting point: 225.degree.-226.degree. C.(d) Specific rotation: [.alpha.].sub.D .sup.20 =+123.5.degree. (c=0.2 in chloroform).(e) Ultraviolet absorption spectrum:.lambda..sub.max .sup.methanol =235 nm (.epsilon.=28600); 262 nm (.epsilon.=21900); 434-435 nm (.epsilon.=11300);.lambda..sub.max .sup.0.1-N NaOH/methanol =246 nm (.epsilon.=22400); 256 nm (.epsilon.=23200); 523-524 nm (.epsilon.=9600).(f) Infrared absorption spectrum: 3500, 1710, 1672, 1628, 1600, 1575, 1472, 1452, 1420, 1390, 1295, 1255, 1218, 1200, 1182, 1105, 1025, 1005, 962, 938, 848, 765, 752, 730 cm.sup.-1.(g) Solubility: Soluble in methanol, ethanol, butanol, acetone, chloroform, ethyl acetate and in water under alkaline conditions; poorly soluble in n-hexane; insoluble in petroleum ether and water.(h) Color reactions: Positive with sulfuric acid and iodine; negative with ninhydrin and anisaldehyde.(i) NMR spectrum in DC.Cl.sub.3 : 1.42 ppm (3H, singlet), 3.02 ppm (1H, quartet), 3.43 ppm (3H, singlet), 3.62 ppm (1H, triplet), 3.64 ppm (1H, singlet), 3.93 ppm (1H, triplet), 7.31-3.41 ppm (4H, olefinic protons), 12.0 ppm (1H, singlet), 12.5 ppm (1H, singlet).Also provided is a process for the antibiotic's production.
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