Monomethine compounds
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United States of America Patent
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Feb 26, 1991
Grant Date -
N/A
app pub date -
Jan 11, 1989
filing date -
Jan 13, 1988
priority date (Note) -
Expired
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Abstract
Compounds of the formula ##STR1## where A represents the atoms necessary to complete a benzoxazole or naphthoxazole ring which is optionally substituted, R.sub.1 and R.sub.2 are each alkyl, hydroxyalkyl or alkoxy alkyl groups wherein the alkyl moiety comprises 1 to 4 carbon atoms, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each hydrogen atoms or alkyl groups having 1 to 4 carbon atoms or phenyl groups, and X is an anion.
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