| 摘要 |
NEW MATERIAL:A compound, expressed by the formula and having the following physico-chemical properties. Appearance; dark blue powder. Melting point; 235-236 deg.C. Solubility; soluble in ethyl acetate, chloroform, dimethyl sulfoxide and benzene, slightly soluble in methanol and ethanol and insoluble in hexane and water. Highresolution mass spectrum (m/z); 493.2106 (M + H)<+>, etc. USE:An antioxidant. PREPARATION:A strain [e.g. Streptomyces prunicolor 1884-SVT2 strain (FERM BP-2728)], belonging to the genus Streptomyces and having the ability to produce BK97B is aerobically cultured at 25-30 deg.C for 2 days. |
