Molecular structure of Neomycin sulfate (CAS NO.1405-10-3) is:

Product Name: Neomycin sulfate
CAS Registry Number: 1405-10-3
IUPAC Name: 5-amino-2-(aminomethyl)-6-[4,6-diamino-2-[4-[3-amino-6-(aminomethyl)-4,5-dihydroxyoxan-2-yl]oxy-3-hydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-3-hydroxycyclohexyl]oxyoxane-3,4-diol; sulfuric acid
Molecular Weight: 908.87918 [g/mol]
Molecular Formula: C₂₃H₅₂N₆O₂₅S₃
H-Bond Donor: 19
H-Bond Acceptor: 31 
EINECS: 215-773-1

Poison by intramuscular, intravenous, and subcutaneous routes. Human systemic effects by ingestion: somnolence, hallucinations and distorted perceptions, and anorexia. A human skin irritant. When heated to decomposition it emits very toxic fumes of SO_x. See also NEOMYCIN.

 Neomycin sulfate , its cas register number is 1405-10-3. It also can be called Mycifradin sulfate; O-2,6-diamino-2,6-dideoxy-.beta.-L-idopyranosyl-(1.->3)-O-.beta.-D-ribofuranosyl-(1->5)]-O-[2,6-diamino-2,6-dideoxy-.alpha.-D-glucopyranosyl-(1->4)]-2-deoxy sulfate .