Maytansinoids
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United States of America Patent
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Jan 5, 1982
Grant Date -
N/A
app pub date -
Jul 23, 1980
filing date -
Jul 30, 1979
priority date (Note) -
Expired
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Abstract
Novel maytansinoids of the formula: ##STR1## wherein X is hydrogen or chlorine, R.sup.1 is C.sub.2-4 alkyl, R.sup.2 is C.sub.2-8 alkyl which may be substituted or methyl which is substituted, have antimicrobial, antimitotic and antitumor activities.
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