The molecule is conjugate acid of streptomycin 6-phosphate arising from deprotonation of the phosphate OH groups and protonation of the secondary amino and both guanidino groups; major species at pH 7.3. It is a conjugate acid of a streptomycin 6-phosphate.
[(1S,2R,3S,4S,5R,6S)-2,4-bis(diaminomethylideneazaniumyl)-5-[(2R,3R,4R,5S)-3-[(2S,3S,4S,5R,6S)-4,5-dihydroxy-6-(hydroxymethyl)-3-(methylazaniumyl)oxan-2-yl]oxy-4-formyl-4-hydroxy-5-methyloxolan-2-yl]oxy-3,6-dihydroxycyclohexyl] phosphate