The molecule is zwitterionic form of O-(1->4)-alpha-L-dihydrostreptosylstreptidine 6-phosphate arising from transfer of two protons from the phosphate to the guanidino groups; major species at pH 7.3. It is a tautomer of an O-(1->4)-alpha-L-dihydrostreptosylstreptidine 6-phosphate.
[(1S,2R,3S,4S,5R,6S)-2,4-bis(diaminomethylideneazaniumyl)-5-[(2R,3R,4S,5S)-3,4-dihydroxy-4-(hydroxymethyl)-5-methyloxolan-2-yl]oxy-3,6-dihydroxycyclohexyl] phosphate