| 摘要 |
PURPOSE:Antibiotic SF-1990 substance. Characteristics thereof are as follows: acidic pale yellowish white powder; specific rotation [alpha]<2>2D-164 deg. (C1, methanol) elementary analysis. C65.80pi, H6.07pi, O28.93wtpi; m.p. 59-61 deg.C; UV spectrum has terminal absorption (methanol); soluble in methanol, ethanol, etc. and slightly soluble in petroleum ether, water, etc.; positive to ferric chloride reaction, etc.; negative to ninhydrin reaction, etc |
