| abstract |
A modified alkali metal or ammonium huminate being made from molecules of the group consisting of <IMAGE> and <IMAGE> wherein R1, R3 and R4 are individually hydrogen or -OH, R2 is <IMAGE> or -CH2- and R5 and R6 are individually selected from the group consisting of hydrogen, -OH and -OCH3, with the proviso that R4, R5 and R6 are not all hydrogen at the same time and their preparation and their medical uses. |