Product Name: Ademetionine 1,4-Butanedisulfonate Other Name: SAME Molecular Formula: C23H41N6O17S5- Molecular Weight: 833.91 Appearance: White crystalline powder Purity: 99% CAS Number: 101020-79-5 EINECS Number: 600-154-4 Standard: USP Supplier: ZhenYiBio Ademetionine 1,4-Butanedisulfonate(SAMe) is derived from the amino acid methionine and is one of the most important methyl donors in the central nervous system. Methylation (donation of methyl groups) is an essential process in ensuring the proper function of a number of organ systems. SAMe is involved in numerous biochemical reactions in tissue including the liver, joints and brain. SAMe is also required for the biosynthesis of critical neurotransmitters and hormones.