Chemical Name: 2-amino-1, 9-dihydro-9-[(1S, 3R, 4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]- 6H-purin-6-one, monohydrate CAS No.: 209216-23-9 Physical & Chemical properties: White powder. Melting Point: 238-240. Quality Standard: Assay (HPLC): NLT 99.0% Related Substances: NMT 0.3%. Application: Anti HBV. Packing: 10~500g/aluminum tin. Storage: Keep in dry, cool and shade place. Remarks: Only for chemical products.