Abstract: The present invention is directed to new antibiotic substances denominated antibiotics GE 37468 A, B and C, their addition salts with bases, the pharmaceutical compositions thereof and their use as medicaments, particularly in the treatment of infectious diseases involving microorganisms susceptible to them.The compounds of the invention are also active as growth promotant agents in animals, such as poultry, swine, ruminants, etc.

Abstract: The present invention relates to novel ester derivatives of antibiotic A 40926 complex and its N-acylaminoglucuronyl aglycone. The compounds of the invention are prepared according to an esterification process involving reaction of an A 40926 substrate with an excess of the selected alkanol in the presence of concentrated mineral acid and are reactive as antibiotics.

Abstract: The present invention is directed to novel amide derivatives of antibiotic GE 2270 compounds and a process for preparing them. Said amide derivatives are antimicrobial agents active against gram positive bacteria as well as gram negative bacteria.

Abstract: The present invention concerns new antiobiotic substances demoninated de-acyl antibiotics A40926, de-acyl antibiotic A 40926P and antibiotic A 40926 amino glucronyl aglycon, and the use of these substances in the treatment of infectious diseases involving microorganisms susceptible to it.

Abstract: The present invention is directed to new antibiotic substances denominated antibiotic GE 2270 factors A.sub.1, A.sub.2, A.sub.3 and H, the addition salts thereof, the pharmaceutical compositions thereof and their use as medicaments, particularly in the treatment of infectious diseases involving microorganisms susceptible to them.

Abstract: The present invention is directed to a new antibiotic substance denominated antibiotic GE 2270 factor C.sub.2a, the addition salts thereof, the pharmaceutical compositions thereof and its use as medicament, particularly in the treatment of infectious diseases involving microorganisms susceptible to it and its use as animal growth promoter.

Abstract: The present invention is directed to a new antibiotic substance denominated antibiotic GE 2270, the addition salts thereof, the pharmaceutical compositions thereof and their use as medicaments, particularly in the treatment of infectious diseases involving microorganisms susceptible to them.

Abstract: The present invention is directed to a new antibiotic substance denominated antibiotic GE 2270, the addition salts thereof, the pharmaceutical compositions thereof and their use as medicaments, particularly in the treatment of infectious diseases involving microorganisms susceptible to them.

Abstract: The present invention is directed to new antibiotic substances denominated antibiotic GE 2270 factors A.sub.1, A.sub.2, A.sub.3 and H, the additional salts thereof, the pharmaceutical compositions thereof and their use as medicaments, particularly in the treatment of infectious diseases involving microorganisms susceptible to them.

Abstract: A novel antibiotic, A 42867, is prepared by cultivating the strain Nocardia sp. ATCC 53492, or an antibiotic A 42867-producing mutant or variant thereof, under submerged aerobic conditions in the presence of assimilable sources of carbon, nitrogen and inorganic salts. The antibiotic and its addition salts are useful in the treatment of infectious diseases and as growth promotant agents.

Abstract: The present invention concerns a new antibiotic substance arbitrarily denominated antibiotic A 40926 complex and its factors antibiotic A 40926 factor A, antibiotic A 40926 factor B, antibiotic A 40926 factor B.sub.0, antibiotic A 40926 factor PA and antibiotic A 40926 factor PB, a process for producing them by culturing the new strain Actinomadura sp. ATCC 39727 or an A 40926 producing variant or mutant thereof and the use of these new antibiotic substances in the treatment of infectious diseases involving microorganisms susceptible to them. The antibiotic substances of the invention are glycopeptidic substances belonging to the vancomycin class of antibiotics which have binding capacity to Acyl-D-Alanyl-D-Alanine.

Abstract: The present invention concerns new antibiotic substances denominated antibiotic A 40926 N-acylaminoglucuronyl aglycon complex AB, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor A, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B.sub.0, antibiotic A 40926 N-acylaminoglucuronyl aglycon factor B.sub.1, antibiotic A 40926 aglycon and the addition salts thereof, a process for their preparation starting from antibiotic A 40926 complex or a factor thereof, and their use in the treatment of infectious diseases involving microorganisms susceptible to them.

Abstract: A novel antibiotic, A 42867, is prepared by cultivating the strain Nocardia sp. ATCC 53492, or an antibiotic A 42867-producing mutant or variant thereof, under submerged aerobic conditions in the presence of assimilable sources of carbon, nitrogen and inorganic salts. The antibiotic and its addition salts are useful in the treatment of infectious diseases and as growth promotant agents.

Abstract: The present invention concerns a new antibiotic substance denominated antibiotic A 40926 mannosyl aglycon and the addition salts thereof, a process for preparing it from antibiotic A 40926 complex or a factor thereof, and its use in the treatment of infectious disease involving microorganisms susceptible to it.

Abstract: The present invention concerns a new antibiotic substance arbitrarily designated as antibiotic SB 22484, to a process for its production by culturing Streptomyces sp. NRRL 15496 or a producing variant or mutant thereof, and to the use of the new antibiotic substance in the treatment of infectious diseases involving microorganisms susceptible to this antibiotic substance.

Abstract: The present invention refers to a chlorine containing antibiotic substance, named antibiotic A/16686 factor A.sub.2, in an essentially pure form. The invention also relates to the process for the production of antibiotic A/16686 factors A.sub.2 by cultivation of an Actinoplanes strain and to the co-produced antibiotic A/16686 factos A.sub.1 and A.sub.3. Antibiotic A/16686 factors A.sub.1, A.sub.2 and A.sub.3 as well as the corresponding non-toxic physiologically acceptable acid addition salts are antimicrobial agents particularly active against gram-positive bacteria.