Flavilium compounds and method of using
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United States of America Patent
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May 19, 1998
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N/A
app pub date -
May 19, 1994
filing date -
Sep 21, 1992
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Abstract
The invention relates to a compound of formula (I) ##STR1## wherein X is a pharmacologically acceptable anion, R.sub.1 and R.sub.2 are independently of each other hydrogen, or an --OY group in which Y is hydrogen, an .alpha.-aminoacyl, or a C.sub.1-5 aminoalkyl residue, R.sub.3, R.sub.4 and R.sub.7 are independently of each other hydrogen, or a C.sub.1-5 alkyl residue R.sub.5 is hydrogen, and .alpha.-aminoacyl, or a C.sub.1-5 alkyl residue, and R.sub.6 is hydrogen, OH.sup.-, or a C.sub.1-5 alkyl residue, and pharmaceutically acceptable salts and esters thereof; and to condensation processes for preparing them.
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