| 摘要 |
NEW MATERIAL:Milbemycin compounds alpha16, alpha17, alpha18, alpha19 and beta8 expressed by formulas I and II, having the following physicochemical properties: Milbemycin alpha16: molecular weight, 514; molecular formula, C30H42O7; solubility, readily soluble in ethyl acetate, acetone, acetonitrile, ethanol and methanol and slightly soluble in water. alpha17: molecular weight, 528; molecular formula, C31H44O70. alpha18: molecular weight, 556; molecular formula, C32H44O80. alpha19: molecular weight, 558; molecular formula, C32H46O80. beta8: molecular weight, 542; molecular formula, C32H50O6, etc. USE:An acaricide and insecticide for sanitary insect pest and farm and garden insect pests. PREPARATION:The aimed compounds are obtained by cultivating the genus Streptomyces B-41-146 strain (FERM P-1438) under aerobic conditions preferably by a deep culture at near 28 deg.C for 5-15 days. |
