摘要:
Antibacterial and antitumor agents designated LL-E33288 complex and their production by new strains of Micromonospora, Micromonospora echinospora ssp. calichensis, NRRL-15839 and NRRL-15975, are disclosed.
摘要:
A novel Micromonospora strain is provided which produces Crisamicin, a complex having gram positive antibacterial, antiviral and antitumor activities. Crisamicin contains as major components compounds Crisamicin A and Crisamicin B, and minor amounts of compounds Crisamicin C, D and E.
摘要:
The invention relates to biologically active dibenzodiazepinone analogs represented by Formula I, to methods of producing them, to pharmaceutical compositions comprising them and to methods of treating neoplastic conditions.
摘要:
Antibacterial and antitumor agents designated pseudoaglycone and dihydro derivatives of LL-E33288 complex and their production by new strains of Micromonospora echinospora ssp. calichensis and NRRL-18149; and their preparation are disclosed.
摘要:
The present invention relates to a new microbial process for the preparation of the compound of formula (I) from a compound of general formula (II) wherein R+ stands for an alkali metal or ammonium ion, by the submerged cultivation of the strain able to 6β-hydroxylate a compound of formula (II) in aerobic fermentation and by the separation and purification of the product of formula (I) formed in the course of the bioconversion, which comprises cultivating a strain of the genera Micromonospora able to 6β-hydroxylate a compound of the general formula (II), wherein R+ is as defined above, on a nutrient medium containing assimilable carbon and nitrogen sources and mineral salts at 25-32 °C, thereafter feeding the substrate to be transformed into the developed culture, then fermenting the substrate until the end of bioconversion, then separating the compound of formula (I) from the culture broth and, if desired, purifying the same.
摘要:
The present invention is directed to a novel depsipeptide which has been isolated from a new marine strain L-13-ACM2-092 belonging to the family Micromonosporaceae. Its production by aerobic fermentation under controlled conditions of the strain, and the isolation and purification of PM-93135 are described herein. The compound and the fermentation broth demonstrate significant activity against several cancer cell lines. The compound also shows activity against several gram positive bacteria.
摘要:
The novel antitumor antibiotic designated herein as BU-3420T is produced by fermentation of Micromonospora chersina strain M956-1 (ATCC 53710). BU-3420T and its triacetate derivative possess antibacterial and antifungal activity and also inhibit the growth of mammalian tumors such as P388 leukemia in mice.