Patent ID: 7259270

Claim:
A compound represented by general formula (I), which is a supermolecular compound consisting of a host component A—carboplatin and a guest component B bound via intermolecular hydrogen bonds, wherein the guest component B is a polycarboxylic acid represented by general formula (II): wherein R1 and R2 may be the same or different from one another, and independently represent hydrogen, hydroxy, carboxy, phenyl or 3,5-dicarboxyphenyl, n represents an integer of from 0 to 3, with the proviso, that R 1 and R 2 on the same carbon atom cannot be hydroxy or carboxy at the same time, and if n is 2, a double bond may exist between the two carbon atoms, or R 1 and R 2 may form together with the carbon atom to which they are attached a cyclohexane ring or a benzene ring optionally substituted by one or two further carboxys.