2-(2-Carboxyethyl)-1,1,1-trimethylhydrazinium hydroxide inner salt 3-(2,2,2-trimethylhydrazine)propionate 76144-81-5 BRN 3938272 Hydrazinium, 2-(2-carboxyethyl)-1,1,1-trimethyl-, hydroxide, inner salt Kvaterin Meldonium Meldonium [INN] Mildronate Quaterin