Antibiotic mm 13902

Antibiotic MM 4550A

Antibiotic nebramycin factor VII

Antibiotic OS-3256-B

Antibiotic planothiocins

Antibiotic produced by a species of micromonospora

Antibiotic produced by Bacillus subtilis ATCC 55422 capable of i

Antibiotic rubradirin B and process for preparing the same

Antibiotic rubradirin C

Antibiotic S 31794/F-1

Antibiotic S/433 and process for its preparation

Antibiotic saframycin S and process for producing the same

Antibiotic SB-72310

Antibiotic SF-1130-x.sub.3 3 substance and production and use th

Antibiotic SF-1942 substance and process for production of the s

Antibiotic SF-2052 substance and production and use thereof

Antibiotic SF-2288 and its preparation method

Antibiotic siomycin A derivatives and production thereof

Antibiotic sporamycin

Antibiotic stalobacins