Netilmicin Sulfate EP Impurity C

4-O-[6-amino-2,3,4,6-tetradeoxy-2- (ethylamino) -α-Dglycero-hex-4-enopyranosyl]-2-deoxy-6-O-[3-deoxy-4- C-methyl-3- (methylamino) -β-L-arabinopyranosyl]-1-Nethyl-D-streptamine (2′-N-ethylnetilmicin) ; (2R,3R,4R,5R) -2- (((1S,2S,3R,4S,6R) -4-amino-3- (((2S,3R) -6- (aminomethyl) -3- (ethylamino) -3,4-dihydro-2H-pyran-2-yl) oxy) -6- (ethylamino) -2-hydroxycyclohexyl) oxy) -5-methyl-4- (methylamino) tetrahydro-2H-pyran-3,5-diol