U-21,963, a New Antibiotic II. Isolation and Characterization

Curtis E. Meyer

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U-21,963, a New Antibiotic II. Isolation and Characterization

机译：U-21963，新型抗生素II。隔离与表征

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The isolation and characterization of antibiotic U-21,963 are discussed. This compound is a highly unsaturated monobasic acid with the molecular formula C9H7NO3. The molecular weight is 177. It is dextrorotatory, [α]D = +138°, and has a pKa of 5.1. The ultraviolet absorption spectrum, which showed a maximum at 223 mμ (ε = 15,115), indicates unsaturation α-β to the carboxyl group, and the infrared spectrum suggests the presence of an acetylenic group. Explosive decomposition of U-21,963 at 97 C conforms with the latter. U-21,963 is relatively insoluble in water, but readily soluble in ethyl alcohol, acetone, and halogenated hydrocarbons.

机译：讨论了抗生素U-21,963的分离和表征。该化合物是分子式为C9H7NO3的高度不饱和一元酸。分子量为177。它是右旋的，[α] D = + 138°，pKa为5.1。紫外吸收光谱在223mμ（ε= 15,115）处显示最大值，表明羧基不饱和α-β，红外光谱表明存在炔基。 U-21,963在97 C下的爆炸分解符合后者。 U-21963相对不溶于水，但易溶于乙醇，丙酮和卤代烃。

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《Applied Microbiology》 |1966年第4期|共2页
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Curtis E. Meyer;
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机译：U-21963，一种新的抗生素I.发现和生物学活性
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7. U-21,963, a New Antibiotic [O] . Thomas R. Pyke, Alma Dietz 1966

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U-21,963, a New Antibiotic II. Isolation and Characterization

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