Pharmaceutical compounds
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United States of America Patent
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Oct 27, 1992
Grant Date -
N/A
app pub date -
May 24, 1991
filing date -
Jun 1, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A pharmaceutical compound of the formula ##STR1## in which R.sup.1 is halo-C.sub.1-10 alkyl, C.sub.1-10 alkylthio, halo-C.sub.1-10 alkylthio or optionally substituted phenylthio, R.sup.2 is hydrogen or C.sub.1-4 alkyl, R.sup.3 and R.sup.4 are each hydrogen or C.sub.1-4 alkyl, and X is oxygen or sulphur; and salts thereof.
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