solid residue was extracted two times with each 20 ml of chloroform by drying up the extract under a reduced pressure 0 09 g of compound no 5 was obtained as a solid substance yield 10 8 synthesis of tetra o acetyl u03b1 d glucuronato cis dl amcha platinum ii nitrate compound no 6 of the present invention in the same procedures as in example 7 except for using pt no 3 2 cis dl amcha instead of pt no 3 2 trans dl amcha in example 7 0 12 g of compound no 6 was obtained yield 14 5 synthesis of tetra o acetyl u03b2 d glucuronato trans dl amcha platinum ii nitrate compound no 9 of the present invention in the same procedures as in example 7 except for using tetra o acetyl u03b2 d glucuronic acid instead of tetra o acetyl u03b1 d glucuronic acid in example 7 0 14 g of compound no 9 was obtained yield 16 9 synthesis of tetra o acetyl u03b2 d glucuronato cis dl amcha platinum ii nitrate compound no 10 of the present invention in the same procedures as in example 8 except for using tetra o acetyl u03b2 d glucuronic acid instead of tetra o acetyl u03b1.