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(Science: chemical) 1-(l-threo-3,6-diamino-4-hydroxyhexanoic acid)-6-(l-2-(2- amino-1,4,5,6-tetrahydro-4-pyrimidinyl)glycine)viomycin. Cyclic basic peptide related to viomycin. It is isolated from an induced mutant of streptomyces griseoverticillatus var. Tuberacticus and acts as an antitubercular agent with less ototoxicity than tuberactinomycin.

Pharmacological action: antibiotics, antitubercular, antibiotics, peptide.

chemical name: viomycin, 1-((3R,4R)-4-hydroxy-3,6-diaminohexanoic acid)-6-(L-2-(2-amino-1,4,5,6-tetrahydro-4-pyrimidinyl)glycine)-, (R)-