发明授权
US4716221A 4'-demethyl-4-epipodophyllotoxin derivative 失效
4'-去甲基-4-表鬼臼毒素衍生物

4'-demethyl-4-epipodophyllotoxin derivative
摘要:
This invention relates to a novel 4'-demethyl-4-epipodophylltoxin derivative of the formula: ##STR1## (wherein R.sub.1 is a lower alkyl group; X.sub.1 and X.sub.2 are each a hydroxyl group or an amino group substituted by one or two lower alkyls, provided that either one of X.sub.1 and X.sub.2 is an amino group substituted by one or two lower alkyls and the other is a hydroxyl group) and salts thereof.
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