Both sisomicin and netilmicin are aminoglycosides similar to gentamicin, but only netilmicin offers any advantage over gentamicin and has been used regularly.,
Department of Medical Microbiology and Infectious Diseases

Mouton, J.W. (Johan W.). (2017). Sisomicin and netilmicin. In Kucers the Use of Antibiotics: A Clinical Review of Antibacterial, Antifungal, Antiparasitic, and Antiviral Drugs, Seventh Edition (pp. 1028–1038). doi:10.1201/9781315152110