Antibiotics AW998A, AW998B, AW998C and AW998D

The compound AW998B which has the structure:

The compound AW998C which has the structure:

The compound AW998D which has the structure:

A method of treating a warm-blooded animal affected by bacterial infections, which method comprises administering to said warm-blooded animal in need thereof an effective amount of a compound selected from the group AW998A, AW998B, AW998C and AW998D or combinations thereof.

A pharmaceutical composition comprising an effective amount of a compound selected from the group AW998A, AW998B, AW998C and AW998D or combinations thereof together with one or more pharmaceutically acceptable carriers.

A process for the preparation of a compound selected from the group AW998A, AW998B, AW998C and AW998D or combinations thereof which comprises cultivating Streptomyces designated LL-AW998 under aerobic conditions, in a sterile liquid medium containing assimilable sources of carbon, nitrogen and inorganic anion and cation salts, until substantial antibiotic activity is imparted to said medium by the production of a compound selected from the group AW998A, AW998B, AW998C and AW998D, or combination thereof, recovering and isolating compounds selected from the group AW998A, AW998B, AW998C and AW998D or combinations thereof.

A disinfectant composition comprising an effective amount of a compound selected from the group AW998A, AW998B, AW998C and AW998D or combinations thereof together with one or more acceptable disinfectant carriers.