Antibiotic mimosamycin

An antibiotic substance mimosamycin, said substance being a neutral yellow prism form which has a melting point of 227.degree. - 231.degree. C.;

• a composition of 61.51% carbon, 4.79% hydrogen and 5.87% nitrogen;
• a molecular weight of 233 according to mass spectrum;
• an empirical formula of C.sub.12 H.sub.11 NO.sub.4 ;
• an ultraviolet absorption spectrum shown in FIG. 1 UV .lambda..sub.max.sup.MeOH nm (log.epsilon.):
• 230 (shoulder) (4.16) 317 (4.14), 396(3.56), UV .lambda..sub.min.sup.MeOH nm (log.epsilon.):
• 277 (3.78), 370(3.53);
• an infrared absorption spectrum shown in FIG. 2, IR .nu..sub.max.sup.KBr cm.sup.-1 :
• 1685, 1655, 1635, 1585, an NMR spectrum (CDCl.sub.3) shown in FIG. 3, .delta.:
• 2.10 (3H, s.), 3.69 (3H, s.), 4.20 (3H, s.), 7.12 (1H, s.), 8.28 (1H, s.);
• a rotary dispersion spectrum (C = 4.37 .times. 10.sup.7, MeOH) of [.PHI]sup.20 (nm):
• -1601 (500), -1373 (490), -1373 (480), -1144 (470), -1144 (460), -1144 (450 - 390), -1373 (380), -1144 (370 -350), -1373 (340), -1831 (330), -2288 (320), -2288 (310), -1831 (300), -1601 (290), -2059 (280), -2517 (270), -3661 (260), -5492 (250);
• and is easily soluble in methanol, ethanol, chloroform, an ester and acetone, sparingly soluble in ethyl ether and n-hexane and insoluble in water;
• and positive to Ehrlich reagent and negative to ninhydrin and Dragendorff reagent.