Sisomicin Impurity 8

Tert-butyl ((2R,3R,4R,5R) -2- (((1S,2S,3R,4S,6R) -3- (((2S,3R) -6- (aminomethyl) -3- ((tert-butoxycarbonyl) amino) -3,4-dihydro-2H-pyran-2-yl) oxy) -4- ((tert-butoxycarbonyl) amino) -6- ((S) -4- ((tert-butoxycarbonyl) amino) -2-hydroxybutanamido) -2-hydroxycyclohexyl) oxy) -3,5-dihydroxy-5-methyltetrahydro-2H-pyran-4-yl) (methyl) carbamate