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US 4,287,362 AGranted
2-Oxopropionaldehyde bis(thiosemicarbazone) derivatives
AssigneeNihon Medi-Physics Co., Ltd.
InventorsAkira Yokoyama, Yasushi Arano
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Abstract
A radioactive diagnostic agent which comprises a protein and a radioactive metallic element combined with intervention of a bifunctional chelating agent of the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group and is characteristic in having high stability even after administered into a human body.
Claims4
A bifunctional chelating compound of the formula:
- ##STR4## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group.
Dependencies are inferred from the claim text.