dihydrostreptomycin

noun

di·​hy·​dro·​strep·​to·​my·​cin -ˌstrep-tə-ˈmīs-ᵊn 

: a toxic antibiotic C₂₁H₄₁N₇O₁₂ formerly used in the treatment of tuberculosis, tularemia, and infections caused by gram-negative organisms but abandoned because of its tendency to impair hearing