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Schlagwörter:
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Zusammenfassung:
Six germacranolides, tirotundin, tagitinin A, orizabin, 8.beta.,14-dihydroxycostunolide and its 14-isobutyrate and 4.beta.,5-dihydrotagitinin C, were isolated from aboveground parts of H. niveus. The last 7 compounds are new.