Drug – bio-affecting and body treating compositions – In vivo diagnosis or in vivo testing – Magnetic imaging agent
Patent
1996-04-18
1997-10-14
Conrad, Joseph
Drug, bio-affecting and body treating compositions
In vivo diagnosis or in vivo testing
Magnetic imaging agent
424 94, 514533, 514547, 514548, 560 38, 560 39, 560 40, 560169, C07C22906
Patent
active
056769261
ABSTRACT:
The invention relates to a process for the production of diethylenetriaminepentacarboxylic acid tetraesters of general formula I ##STR1## in which R.sup.1 and Z have different meanings.
REFERENCES:
Williams et al., J. Org. Chem., 58, 1151-1158 (1993).
C.F. Ward, Soc., 121: 1164 (1922).
Niedballa Ulrich
Platzek Johannes
Radeuchel Bernd
Conrad Joseph
Schering Aktiengesellschaft
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