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(Science: chemical) O-3-deoxy-4-c-methyl-3-(methylamino)-beta-l- arabinopyranosyl-(1-6)-o-(2,6-diamino-2,3,4,6-tetradeoxy- alpha-d-glycero-hex-4-enopyranosyl-(1-4)-2-deoxy-n(1)- ethyl-d-streptamine. Semisynthetic 1-n-ethyl derivative of sisomycin, an aminoglycoside antibiotic with action similar to gentamicin, but less ear and kidney toxicity.

Pharmacological action: gentamicins.

Chemical name: D-Streptamine, O-3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl-(1-6)-O-(2,6-diamino-2,3,4,6-tetradeoxy-alpha-D-glycero-hex-4-enopyranosyl-(1-4))-2-deoxy-N1-ethyl-