2'-Cyano pyrimidine nucleoside compounds
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United States of America Patent
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Apr 1, 1997
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Sep 7, 1994
filing date -
Jun 15, 1990
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Abstract
The pyrimidine compounds of the present invention are represented by the following formula: ##STR1## and pharmaceutically acceptable salts thereof, wherein, R.sup.1 represents a hydroxyl or an amino which may be substituted by an acyl group; R.sup.2 represents a hydrogen atom or an alkyl having 1 to 4 carbons; R.sup.3 represents a hydrogen or a hydroxyl; and R.sup.4 and R.sup.5 each represent a hydrogen or together form a group --R.sup.6 R.sup.7 Si--O--SiR.sup.6' R.sup.7' --, wherein R.sup.6, R.sup.7, R.sup.6' and R.sup.7' are the same or different from one another and each represent an alkyl having 1 to 4 carbons. The compounds of the present invention exhibit an excellent antitumor effect.
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