23-Demycinosyldesmycosin derivatives
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United States of America Patent
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May 7, 1985
Grant Date -
N/A
app pub date -
Mar 30, 1983
filing date -
Apr 7, 1982
priority date (Note) -
Expired
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Abstract
Novel 23-demycinosyldesmycosin derivatives are disclosed of the formula ##STR1## wherein A is oxygen or sulfur, R.sub.1 is optionally substituted phenyl or ##STR2## group, in which R.sub.3 is optionally substituted phenyl and R.sub.4 and R.sub.5 are the same or different and are hydrogen, lower alkyl or optionally substituted phenyl, and R.sub.2 is hydrogen or hydroxyl. The compounds or non-toxic salts thereof are useful as antibiotics.
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