Bayer Aktiengesellschaft

Theo Schroder

Delf Schmidt

Karl G Metzger

Jorg Pfitzner

Martin Scheer

Gunter Benz

Klaus Bauer

Wilfried Kaufmann

Horst Weyland

Werner Frommer

Dietmar Schafer

Karl-Georg Metzger

Gunther Kinast

Wolfgang Gau

Matthias Schuller

Georg Metzger

A 3-amino-4,5-dihydroxy-piperidine compound of the formula (I) ##STR1## in which R.sup.1 represents hydrogen, alkyl having up to 8 carbon atoms, aralkyl having 7 to 14 carbon atoms, or represents a group of the formula ##STR2## R.sup.4 denotes straight-chain or branched alkyl having up to 8 carbon atoms, straight-chain or branched alkoxy having up to 8 carbon atoms, or aralkoxy having up to 10 carbon atoms, and

3-Amino-4,5-dihydroxypiperidines, process for their preparation and

An antibiotic compound which can be in the iron-free or iron-containing form and has the structural formula (B) as described herein. The compound possesses antimicrobial activity. Also fermentation processes for preparation of the above-mentioned antibiotic compound. In addition, pharmaceutical compositions containing said antibiotic compound and the use of said antibiotic compound and compositions for combating bacterial infection.

Streptomyces species and process for producing antibiotic

The invention relates to an antibiotic compound which can be in the iron-free or iron-containing form and has the structural formula (A) as described herein. The compound possesses antimicrobial activity. Also included in the invention are fermentation processes for preparation of the above-mentioned antibiotic compound. In addition, the invention includes pharmaceutical compositions containing said antibiotic compound and the use of said antibiotic compound and compositions for combating bacterial infections.

Antibiotic compound, its production and its medicinal use

The invention relates to an antibiotic compound which can be in the iron-free or iron-containing form and has the structural formula (B) as described herein. The compound posesses antimicrobial activity. Also included in the invention are fermentation processes for preparation of the above-mentioned antibiotic compound. In addition, the invention includes pharmaceutical compositions containing said antibiotic compound and the use of said antibiotic compound and compositions for combating bacterial infection.

The invention relates to the provision of an antimicrobial antibiotic obtained by culturing Actinoplanes strain ATCC 31440 under aerobic conditions in the presence of sources of carbon and nitrogen and in the presence of trace amounts of minerals. In addition to their use as antimicrobials, the antibiotics of the invention can be used for improving the growth and feed utilization in animals.

Antibiotic, its production and its medicinal use

The invention relates to new derivatives, substituted on one or more nitrogen atoms, of 4,6-di-(amino-glycosyl)-1,3-diamino-cyclitols, which include the gentamycins, sisomicin, verdamycin, tobramycin, the kanamycins, the antibiotics G-418, 66-40 B, 66-40 D, JI-20 B, JI-20 B and G-52, and the 5-epi-, 5-epi-amino-5-deoxy and 5-epi-azido-5-deoxy derivatives of these antibiotics and the metamycins, and furthermore to processes for the preparation of these derivatives and to pharmaceutical compositions which contain the derivatives of the above mentioned 4,6-di-(amino-glycosyl)-1,3-diamino-cyclitols or their pharmaceutically acceptable acid addition salts, and to their use as antibacterial agents.

N-Substituted amino glycoside compounds, their production, and their use

Strains of Actinoplanes produce an antibiotic substance upon aerobic cultivation. The antibiotic is soluble in water with a pronounced band in the UV absorption spectrum at 267 nm. Methods for preparing and using the antibiotic, both therapeutically and for promoting livestock growth, and composition adapted for these uses are described.

Antibiotic

Strains of Actinoplanes produce an antibiotic substance upon aerobic cultivation. The antibiotic is sparingly soluble in water with a pronounced band in the UV absorption spectrum at 307 nm. Methods for preparing and using the antibiotic, both therapeutically and for promoting livestock growth, and composition adapted for these uses are described.

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Wuppertal, Germany

Theo Schroder