streptomycin A amino cyclitol glycoside that consists of streptidine having a disaccharyl moiety attached at the 4-position. The parent of the streptomycin class Stm STR CHEBI:45745 CHEBI:9284 Sm CHEBI:15119 CHEBI:26784 streptomycins antibiotic antifungal drug antibiotic fungicide second line or reserve tuberculosis drug first line tuberculosis drug