再颁专利
USRE35218E Azatetracycle compounds 失效
氨基四环化合物

Azatetracycle compounds
摘要:
An azatetracycle compound useful as 5HT.sub.3 antagonists of the general formula ##STR1## wherein D is a tetracycle of the structure ##STR2## wherein Ar is an aromatic moiety and B is either NH or O.
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