Chelated complexes of paramagnetic metals with low toxicity
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United States of America Patent
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Nov 21, 2000
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Apr 16, 1998
filing date -
Apr 18, 1997
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Abstract
Compounds of formulae (I) and (II) ##STR1## wherein the R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 groups have the meanings defined in the disclosure, are useful chelants for metal ions. The complexes of compounds (I) and (II) with paramagnetic ions are useful as contrast agents for M.R.I. imaging.
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