| 摘要 |
New biologically active substances - called WS 7739 - having pharmacological activity are prepared by fermentation of a strain belonging to the genus Streptomyces, e.g. Streptomyces phaeofaciens subsp. matsuenensis no. 7739 FERM BP 660 in a nutrient medium containing sources of assimilable carbon and nitrogen under aerobic conditions; pharmaceutical compositions containing these substances as active ingredients are effective in treating deseases, such as asthma, thrombosis etc. |
