Abstract: The invention provides an antigen or drug delivery complex containing a complex of an antigen or drug and a cationic molecule, and an anionic molecule encapsulating the same. The antigen or drug delivery complex can be used as a main component of a drug delivery system that delivers various antigens and drugs to a particular cell or organ.

Abstract: The invention provides an antigen or drug delivery complex containing a complex of an antigen or drug and a cationic molecule, and an anionic molecule encapsulating the same. The antigen or drug delivery complex can be used as a main component of a drug delivery system that delivers various antigens and drugs to a particular cell or organ.

Abstract: A radioactive iodine-labeled compound represented by the following formula (I): wherein X represents a radioactive iodine atom which may substitute at an arbitrary position on the benzene ring (preferably 123I, 125I and the like.), n represents an integer of 1 to 3, R1 and R2 each independently represent a substituted or unsubstituted alkyl group, Y represents an alkylene group having 1 to 6 carbon atoms (preferably methylene group), M represents a counter ion, and m represents the number of ions required to neutralize the charge of the molecule. A radioactive iodine-labeled compound that can selectively accumulate in tumor cells or tumor tissue and a scintillation imaging agent containing the compound are provided.

Abstract: A radioactive iodine-labeled compound represented by the following formula (I): wherein X represents a radioactive iodine atom which may substitute at an arbitrary position on the benzene ring (preferably 123I, 125I and the like.), n represents an integer of 1 to 3, R1 and R2 each independently represent a substituted or unsubstituted alkyl group, Y represents an alkylene group having 1 to 6 carbon atoms (preferably methylene group), M represents a counter ion, and m represents the number of ions required to neutralize the charge of the molecule. A radioactive iodine-labeled compound that can selectively accumulate in tumor cells or tumor tissue and a scintillation imaging agent containing the compound are provided.

Abstract: A radioactive iodine-labeled compound represented by the following formula wherein X represents a radioactive iodine atom which may substitute at an arbitrary position on the benzene ring (preferably 123I, 125I and the like.), n represents an integer of 1 to 3, R1 and R2 each independently represent a substituted or unsubstituted alkyl group, Y represents an alkylene group having 1 to 6 carbon atoms (preferably methylene group), M represents a counter ion, and m represents the number of ions required to neutralize the charge of the molecule. A radioactive iodine-labeled compound that can selectively accumulate in tumor cells or tumor tissue and a scintillation imaging agent containing the compound are provided.

Abstract: A radioactive iodine-labeled compound represented by the following formula 1

Abstract: A radioactive diagnostic agent which comprises as an active ingredient a glucosamine derivative of the formula: ##STR1## wherein Ac is an acetyl group and X is a radioactive iodine atom.

Abstract: A radioactive diagnostic agent which comprises a physiologically active substance and a radioactive metallic element combined with a compound of the formula: ##STR1## wherein R is a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group and n is an integer of 0 to 4. The agent is characteristic in having a high stability even after being administered into a human body and showing the substantially the same behavior as the physiologically active substance itself in a human body.