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US4973693A Novel pentacyclic compound and stereoselective synthesis thereof 失效
新型五环化合物及其立体选择性合成

Novel pentacyclic compound and stereoselective synthesis thereof
摘要:
Novel pentacyclic compounds having antimicrobial and antitumor activity and a process for preparing the same. The pentacyclic compounds are also usefual as intermediates in the production of known tetracyclic antitumor compounds.
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