HIGH PURITY (-) HYDROXYCITRIC ACID METAL SALT DERIVATIVES AND METHOD OF PREPARATION OF THE SAME

摘要

The present invention relates to high purity (-) Hydroxycitric acid metal salt derivatives of more than 98% purity having formula Il (a-e), lla; X, 2X = Na Mb; X, 2X= K Hc; X = K, Y = Ca Hd1 X= Na, Y = Ca He; X= 1 /2 Mg, Y = Mg and the method of preparation of high purity (-) hydroxycitric acid metal salt derivatives from (-) hydroxycitric acid lactone having formula (1 ) which in turn is isolated in a simple and efficient manner from dried rinds of the fruits of Garcinia species. This invention employes the HPLC method and optical rotation in assessing the purity (-) hydroxycitric acid and corresponding lactone (1 ).