Entecavir   CAS No. 142217-69-4 

Structural Formula:

Chemical name: 
2-amino-9-[（1S,3R,4S）-4-hydroxyl-3-methylol-2-methylene cyclopentyl]1,9-di-H-6H-purine-6-one-hydrate

Molecular Formula：C₁₂H₁₅N₅O₃·H₂O    

Molecular Weight：295.3

Quality Index:   In-House Standard

Appearance: off-white to white crystallization powder

Assay: more than 99%

Single impurity: NMT0.5%

Total impurity:  NMT1.0%

Application: Anti Virus B Hepatic Disease

Packaging: 50-100g//aluminum foil bag

Storage: room temperature, keep in dry cool place