摘要:
Deoxynarasin antibiotic complex, comprising 20-deoxynarasin and 20-deoxy-epi-17- narasin, is produced by submerged aerobic fermentation of Streptomyces aureofaciens NRRL 11181. 20-Deoxynarasin and 20-deoxy-epi-17- narasin are separated and isolated by chromatography. The deoxynarasin complex, 20-deoxynarasin and 20-deoxy-epi-17-narasin are antibacterial and anticoccidial agents and also increase feed-utilization efficiency in ruminants.
摘要:
Vincaleukoblastine derivates of the formula wherein
R 2 is CH 3 or CHO; when taken singly, R 5 is H and one of R 3 and R 4 is OH or H and the other is C 2 H 5 and when R 4 and R 5 are taken together, they form an a-epoxide ring R 3 is C 2 H 5 , when taken singly R 6 is H and R' is OR' and when R 6 and R' are taken together they are =0; R 1 is H or acetyl; and R is OCH, or NH-NH 2 with the proviso that if R is -NH-NH 2 , R 1 is H; or a pharmaceutically acceptable acid addition saft thereof, are prepared by reduction of the corresponding 4-desacetoxy-4-oxo derivatives which in turn were prepared by the oxidation of the corresponding 4- desacetyl-4β-hydroxy derivatives.
摘要:
Deoxynarasin antibiotic complex, comprising 20-deoxynarasin and 20-deoxy-epi-17- narasin, is produced by submerged aerobic fermentation of Streptomyces aureofaciens NRRL 11181. 20-Deoxynarasin and 20-deoxy-epi-17- narasin are separated and isolated by chromatography. The deoxynarasin complex, 20-deoxynarasin and 20-deoxy-epi-17-narasin are antibacterial and anticoccidial agents and also increase feed-utilization efficiency in ruminants.