Gentamicin Nitroso Impurity 16

N- ((2R,3R,4R,5R) -2- (((1S,2S,3R,4S,6R) -4,6-diamino-3- (((2R,3R,6S) -3-amino-6- ((R) -1- (methylamino) ethyl) tetrahydro-2H-pyran-2-yl) oxy) -2-hydroxycyclohexyl) oxy) -3,5-dihydroxy-5-methyltetrahydro-2H-pyran-4-yl) -N-methylnitrous amide