| abstract |
A novel tetravalent platinum complex having strong antitumor activity against malignant tumors and relatively reduced side effects is provided. A tetravalent platinum complex having cis, cis-spiro [4,4] nonane-1,6-diamine, and an optically active diamine as a ligand, particularly represented by the following formula (G): A tetravalent platinum dichloromalonate complex comprising (S, S, S) -cis, cis-spiro [4,4] nonane-1,6diamine as a ligand. [Chemical 1] [Selection figure] None |