Diagnostic radiopharmaceutical compounds (That)
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United States of America Patent
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Nov 25, 1997
Grant Date -
N/A
app pub date -
Apr 28, 1995
filing date -
Jul 12, 1993
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Abstract
Tetradentate ligands are used to form neutral 99m-technetium complexes which may be useful as radiopharmaceuticals e.g. as brain imaging agents. The ligands have the structure ##STR1## where n is 2 or 3, m is 0-4, R is H or substituted or unsubstituted C.sub.1 -C.sub.6 alkyl, provided that one CR.sub.2 group adjacent the starred nitrogen atom represents CO and forms with the adjacent N atom, a --CONH-- amide group, Y is unsubstituted or substituted C.sub.1 -C.sub.6 alkyl, and one of X and X' represents H or a labile thiol protecting group while the other is unsubstituted or substituted C.sub.1 -C.sub.6 alkyl, alkenyl or alkynyl.
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